402171045 has 16 divisors (see below), whose sum is σ = 658439232. Its totient is φ = 209502720.

The previous prime is 402170999. The next prime is 402171047. The reversal of 402171045 is 540171204.

It is not a de Polignac number, because 402171045 - 2¹¹ = 402168997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402171047) 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, 311116 + ... + 312405.

It is an arithmetic number, because the mean of its divisors is an integer number (41152452).

Almost surely, 2^402171045 is an apocalyptic number.

It is an amenable number.

402171045 is a deficient number, since it is larger than the sum of its proper divisors (256268187).

402171045 is a wasteful number, since it uses less digits than its factorization.

402171045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623572.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 402171045 is about 20054.2026767458. The cubic root of 402171045 is about 738.1369282726.

The spelling of 402171045 in words is "four hundred two million, one hundred seventy-one thousand, forty-five".