402252401 has 16 divisors (see below), whose sum is σ = 437342400. Its totient is φ = 368722368.

The previous prime is 402252391. The next prime is 402252407. The reversal of 402252401 is 104252204.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402252401 is a prime.

It is a super-2 number, since 2×402252401² = 323613988220529602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402252407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86795 + ... + 91311.

It is an arithmetic number, because the mean of its divisors is an integer number (27333900).

Almost surely, 2^402252401 is an apocalyptic number.

It is an amenable number.

402252401 is a deficient number, since it is larger than the sum of its proper divisors (35089999).

402252401 is a wasteful number, since it uses less digits than its factorization.

402252401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 402252401 is about 20056.2309769308. The cubic root of 402252401 is about 738.1866979911.

The spelling of 402252401 in words is "four hundred two million, two hundred fifty-two thousand, four hundred one".