402991245 has 24 divisors (see below), whose sum is σ = 707366400. Its totient is φ = 212206176.

The previous prime is 402991241. The next prime is 402991247. The reversal of 402991245 is 542199204.

402991245 is a `hidden beast` number, since 402 + 9 + 9 + 1 + 245 = 666.

It is not a de Polignac number, because 402991245 - 2² = 402991241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402991241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53125 + ... + 60234.

It is an arithmetic number, because the mean of its divisors is an integer number (29473600).

Almost surely, 2^402991245 is an apocalyptic number.

402991245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402991245 is a deficient number, since it is larger than the sum of its proper divisors (304375155).

402991245 is a wasteful number, since it uses less digits than its factorization.

402991245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113449 (or 113446 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 402991245 is about 20074.6418398934. The cubic root of 402991245 is about 738.6383805868.

The spelling of 402991245 in words is "four hundred two million, nine hundred ninety-one thousand, two hundred forty-five".