402155145 has 64 divisors (see below), whose sum is σ = 865175040. Its totient is φ = 173021184.

The previous prime is 402155123. The next prime is 402155153. The reversal of 402155145 is 541551204.

It is not a de Polignac number, because 402155145 - 2⁶ = 402155081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3549 + ... + 28581.

It is an arithmetic number, because the mean of its divisors is an integer number (13518360).

Almost surely, 2^402155145 is an apocalyptic number.

402155145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402155145 is an abundant number, since it is smaller than the sum of its proper divisors (463019895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402155145 is a wasteful number, since it uses less digits than its factorization.

402155145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25071 (or 25065 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 402155145 is about 20053.8062471941. The cubic root of 402155145 is about 738.1272006273.

The spelling of 402155145 in words is "four hundred two million, one hundred fifty-five thousand, one hundred forty-five".