402571 has 8 divisors (see below), whose sum is σ = 438480. Its totient is φ = 367392.

The previous prime is 402559. The next prime is 402581. The reversal of 402571 is 175204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402571 - 2⁷ = 402443 is a prime.

It is a Duffinian number.

402571 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2160 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (54810).

2⁴⁰²⁵⁷¹ is an apocalyptic number.

402571 is a deficient number, since it is larger than the sum of its proper divisors (35909).

402571 is a wasteful number, since it uses less digits than its factorization.

402571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 402571 is about 634.4848303939. The cubic root of 402571 is about 73.8381537084.

Adding to 402571 its reverse (175204), we get a palindrome (577775).

It can be divided in two parts, 4025 and 71, that added together give a 12-th power (4096 = 2¹²).

The spelling of 402571 in words is "four hundred two thousand, five hundred seventy-one".