61921925 has 12 divisors (see below), whose sum is σ = 82690020. Its totient is φ = 45726720.

The previous prime is 61921913. The next prime is 61921949. The reversal of 61921925 is 52912916.

61921925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 12837889 + 49084036 = 3583^2 + 7006^2 .

It is not a de Polignac number, because 61921925 - 2¹² = 61917829 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94940 + ... + 95589.

It is an arithmetic number, because the mean of its divisors is an integer number (6890835).

Almost surely, 2^61921925 is an apocalyptic number.

61921925 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61921925 is a deficient number, since it is larger than the sum of its proper divisors (20768095).

61921925 is a wasteful number, since it uses less digits than its factorization.

61921925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190552 (or 190547 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 61921925 is about 7869.0485447734. The cubic root of 61921925 is about 395.6229554903.

Subtracting from 61921925 its reverse (52912916), we obtain a palindrome (9009009).

The spelling of 61921925 in words is "sixty-one million, nine hundred twenty-one thousand, nine hundred twenty-five".