625131 has 24 divisors (see below), whose sum is σ = 1010160. Its totient is φ = 381888.

The previous prime is 625129. The next prime is 625133. The reversal of 625131 is 131526.

It is an interprime number because it is at equal distance from previous prime (625129) and next prime (625133).

It is not a de Polignac number, because 625131 - 2¹ = 625129 is a prime.

It is a super-2 number, since 2×625131² = 781577534322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

625131 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625131.

It is not an unprimeable number, because it can be changed into a prime (625133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4495 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (42090).

2⁶²⁵¹³¹ is an apocalyptic number.

625131 is a deficient number, since it is larger than the sum of its proper divisors (385029).

625131 is a wasteful number, since it uses less digits than its factorization.

625131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 153 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 625131 is about 790.6522623758. The cubic root of 625131 is about 85.5047704325.

Adding to 625131 its reverse (131526), we get a palindrome (756657).

The spelling of 625131 in words is "six hundred twenty-five thousand, one hundred thirty-one".