402256261 has 16 divisors (see below), whose sum is σ = 465393600. Its totient is φ = 343617280.

The previous prime is 402256259. The next prime is 402256291. The reversal of 402256261 is 162652204.

It is a cyclic number.

It is not a de Polignac number, because 402256261 - 2¹ = 402256259 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 (402256241) 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, 147690 + ... + 150388.

It is an arithmetic number, because the mean of its divisors is an integer number (29087100).

Almost surely, 2^402256261 is an apocalyptic number.

It is an amenable number.

402256261 is a deficient number, since it is larger than the sum of its proper divisors (63137339).

402256261 is a wasteful number, since it uses less digits than its factorization.

402256261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 402256261 is about 20056.3272061462. The cubic root of 402256261 is about 738.1890591881.

The spelling of 402256261 in words is "four hundred two million, two hundred fifty-six thousand, two hundred sixty-one".