402547 has 4 divisors (see below), whose sum is σ = 407160. Its totient is φ = 397936.

The previous prime is 402541. The next prime is 402551. The reversal of 402547 is 745204.

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

It is a cyclic number.

It is not a de Polignac number, because 402547 - 2⁷ = 402419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173 + ... + 2350.

It is an arithmetic number, because the mean of its divisors is an integer number (101790).

2⁴⁰²⁵⁴⁷ is an apocalyptic number.

402547 is a deficient number, since it is larger than the sum of its proper divisors (4613).

402547 is an equidigital number, since it uses as much as digits as its factorization.

402547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 402547 is about 634.4659171303. The cubic root of 402547 is about 73.8366863475.

It can be divided in two parts, 402 and 547, that added together give a palindrome (949).

The spelling of 402547 in words is "four hundred two thousand, five hundred forty-seven".