61625121 has 4 divisors (see below), whose sum is σ = 82166832. Its totient is φ = 41083412.

The previous prime is 61625107. The next prime is 61625141. The reversal of 61625121 is 12152616.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61625121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61625091 and 61625100.

It is not an unprimeable number, because it can be changed into a prime (61625101) 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, 10270851 + ... + 10270856.

It is an arithmetic number, because the mean of its divisors is an integer number (20541708).

Almost surely, 2^61625121 is an apocalyptic number.

It is an amenable number.

61625121 is a deficient number, since it is larger than the sum of its proper divisors (20541711).

61625121 is a wasteful number, since it uses less digits than its factorization.

61625121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20541710.

The product of its digits is 720, while the sum is 24.

The square root of 61625121 is about 7850.1669409000. The cubic root of 61625121 is about 394.9898432468.

Adding to 61625121 its reverse (12152616), we get a palindrome (73777737).

The spelling of 61625121 in words is "sixty-one million, six hundred twenty-five thousand, one hundred twenty-one".