252630407 has 2 divisors, whose sum is σ = 252630408. Its totient is φ = 252630406.

The previous prime is 252630359. The next prime is 252630431. The reversal of 252630407 is 704036252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252630407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252630407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252630457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126315203 + 126315204.

It is an arithmetic number, because the mean of its divisors is an integer number (126315204).

Almost surely, 2^252630407 is an apocalyptic number.

252630407 is a deficient number, since it is larger than the sum of its proper divisors (1).

252630407 is an equidigital number, since it uses as much as digits as its factorization.

252630407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 252630407 is about 15894.3514180353. The cubic root of 252630407 is about 632.1622245192.

Adding to 252630407 its reverse (704036252), we get a palindrome (956666659).

The spelling of 252630407 in words is "two hundred fifty-two million, six hundred thirty thousand, four hundred seven".