405281145 has 8 divisors (see below), whose sum is σ = 648449856. Its totient is φ = 216149936.

The previous prime is 405281117. The next prime is 405281147. The reversal of 405281145 is 541182504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405281145 is a prime.

It is a super-2 number, since 2×405281145² = 328505612985022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (405281147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13509357 + ... + 13509386.

It is an arithmetic number, because the mean of its divisors is an integer number (81056232).

Almost surely, 2^405281145 is an apocalyptic number.

It is an amenable number.

405281145 is a deficient number, since it is larger than the sum of its proper divisors (243168711).

405281145 is a wasteful number, since it uses less digits than its factorization.

405281145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27018751.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 405281145 is about 20131.5956893635. The cubic root of 405281145 is about 740.0347834879.

The spelling of 405281145 in words is "four hundred five million, two hundred eighty-one thousand, one hundred forty-five".