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402421441 = 3331120811
BaseRepresentation
bin10111111111000…
…111011011000001
31001001020010102211
4113333013123001
51311004441231
6103533142121
712654345232
oct2777073301
91031203384
10402421441
1119717a204
12b292a941
13654ab7c6
143b635089
15254e0eb1
hex17fc76c1

402421441 has 4 divisors (see below), whose sum is σ = 402545584. Its totient is φ = 402297300.

The previous prime is 402421381. The next prime is 402421457. The reversal of 402421441 is 144124204.

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 402421441 - 29 = 402420929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472421441) 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, 57075 + ... + 63736.

It is an arithmetic number, because the mean of its divisors is an integer number (100636396).

Almost surely, 2402421441 is an apocalyptic number.

It is an amenable number.

402421441 is a deficient number, since it is larger than the sum of its proper divisors (124143).

402421441 is a wasteful number, since it uses less digits than its factorization.

402421441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124142.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 402421441 is about 20060.4446859984. Note that the first 3 decimals coincide. The cubic root of 402421441 is about 738.2900871433.

Adding to 402421441 its reverse (144124204), we get a palindrome (546545645).

The spelling of 402421441 in words is "four hundred two million, four hundred twenty-one thousand, four hundred forty-one".

Divisors: 1 3331 120811 402421441