402553261 has 8 divisors (see below), whose sum is σ = 448493184. Its totient is φ = 358170720.

The previous prime is 402553223. The next prime is 402553267. The reversal of 402553261 is 162355204.

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

It is a cyclic number.

It is not a de Polignac number, because 402553261 - 2⁹ = 402552749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402553267) 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, 388800 + ... + 389833.

It is an arithmetic number, because the mean of its divisors is an integer number (56061648).

Almost surely, 2^402553261 is an apocalyptic number.

It is an amenable number.

402553261 is a deficient number, since it is larger than the sum of its proper divisors (45939923).

402553261 is a wasteful number, since it uses less digits than its factorization.

402553261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778691.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 402553261 is about 20063.7299872182. The cubic root of 402553261 is about 738.3706915089.

The spelling of 402553261 in words is "four hundred two million, five hundred fifty-three thousand, two hundred sixty-one".