625038121 has 4 divisors (see below), whose sum is σ = 625338000. Its totient is φ = 624738244.

The previous prime is 625038097. The next prime is 625038137. The reversal of 625038121 is 121830526.

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: 121830526 = 2 ⋅60915263.

It is a cyclic number.

It is not a de Polignac number, because 625038121 - 2¹³ = 625029929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625038121.

It is not an unprimeable number, because it can be changed into a prime (625038181) 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, 146791 + ... + 150988.

It is an arithmetic number, because the mean of its divisors is an integer number (156334500).

Almost surely, 2^625038121 is an apocalyptic number.

It is an amenable number.

625038121 is a deficient number, since it is larger than the sum of its proper divisors (299879).

625038121 is a wasteful number, since it uses less digits than its factorization.

625038121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299878.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 625038121 is about 25000.7624083747. The cubic root of 625038121 is about 855.0053559164.

Adding to 625038121 its reverse (121830526), we get a palindrome (746868647).

The spelling of 625038121 in words is "six hundred twenty-five million, thirty-eight thousand, one hundred twenty-one".