625121 has 4 divisors (see below), whose sum is σ = 714432. Its totient is φ = 535812.

The previous prime is 625111. The next prime is 625129. The reversal of 625121 is 121526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121526 = 2 ⋅60763.

It is a cyclic number.

It is not a de Polignac number, because 625121 - 2⁶ = 625057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 625121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625121.

It is not an unprimeable number, because it can be changed into a prime (625129) 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, 44645 + ... + 44658.

It is an arithmetic number, because the mean of its divisors is an integer number (178608).

2⁶²⁵¹²¹ is an apocalyptic number.

It is an amenable number.

625121 is a deficient number, since it is larger than the sum of its proper divisors (89311).

625121 is an equidigital number, since it uses as much as digits as its factorization.

625121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89310.

The product of its digits is 120, while the sum is 17.

The square root of 625121 is about 790.6459384579. The cubic root of 625121 is about 85.5043145002.

Adding to 625121 its reverse (121526), we get a palindrome (746647).

It can be divided in two parts, 625 and 121, that multiplied together give a square (75625 = 275²).

The spelling of 625121 in words is "six hundred twenty-five thousand, one hundred twenty-one".