402256145 has 4 divisors (see below), whose sum is σ = 482707380. Its totient is φ = 321804912.

The previous prime is 402256111. The next prime is 402256171. The reversal of 402256145 is 541652204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131423296 + 270832849 = 11464^2 + 16457^2 .

It is a cyclic number.

It is not a de Polignac number, because 402256145 - 2²⁸ = 133820689 is a prime.

It is a super-2 number, since 2×402256145² = 323620012380522050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40225610 + ... + 40225619.

It is an arithmetic number, because the mean of its divisors is an integer number (120676845).

Almost surely, 2^402256145 is an apocalyptic number.

It is an amenable number.

402256145 is a deficient number, since it is larger than the sum of its proper divisors (80451235).

402256145 is an equidigital number, since it uses as much as digits as its factorization.

402256145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80451234.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 402256145 is about 20056.3243142905. The cubic root of 402256145 is about 738.1889882301.

The spelling of 402256145 in words is "four hundred two million, two hundred fifty-six thousand, one hundred forty-five".