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405018041 = 1921316739
BaseRepresentation
bin11000001001000…
…001010110111001
31001020010001022012
4120021001112321
51312141034131
6104104535305
713015411421
oct3011012671
91036101265
10405018041
1119869305a
12b3781535
1365baa65c
143bb0d481
152585552b
hex182415b9

405018041 has 4 divisors (see below), whose sum is σ = 426334800. Its totient is φ = 383701284.

The previous prime is 405018011. The next prime is 405018059. The reversal of 405018041 is 140810504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405018041 - 214 = 405001657 is a prime.

It is a super-2 number, since 2×4050180412 = 328079227070955362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 405017998 and 405018016.

It is not an unprimeable number, because it can be changed into a prime (405018001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10658351 + ... + 10658388.

It is an arithmetic number, because the mean of its divisors is an integer number (106583700).

Almost surely, 2405018041 is an apocalyptic number.

It is an amenable number.

405018041 is a deficient number, since it is larger than the sum of its proper divisors (21316759).

405018041 is a wasteful number, since it uses less digits than its factorization.

405018041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21316758.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 405018041 is about 20125.0600247552. The cubic root of 405018041 is about 739.8746080452.

Adding to 405018041 its reverse (140810504), we get a palindrome (545828545).

The spelling of 405018041 in words is "four hundred five million, eighteen thousand, forty-one".

Divisors: 1 19 21316739 405018041