402140507 has 4 divisors (see below), whose sum is σ = 410696736. Its totient is φ = 393584280.

The previous prime is 402140503. The next prime is 402140513. The reversal of 402140507 is 705041204.

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 402140507 - 2² = 402140503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402140503) 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, 4278044 + ... + 4278137.

It is an arithmetic number, because the mean of its divisors is an integer number (102674184).

Almost surely, 2^402140507 is an apocalyptic number.

402140507 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

402140507 is a deficient number, since it is larger than the sum of its proper divisors (8556229).

402140507 is an equidigital number, since it uses as much as digits as its factorization.

402140507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556228.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 402140507 is about 20053.4412757512. The cubic root of 402140507 is about 738.1182448490.

The spelling of 402140507 in words is "four hundred two million, one hundred forty thousand, five hundred seven".