1979925 has 12 divisors (see below), whose sum is σ = 3273600. Its totient is φ = 1055920.

The previous prime is 1979911. The next prime is 1979941. The reversal of 1979925 is 5299791.

1979925 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 1979925 - 2⁵ = 1979893 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its 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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13125 + ... + 13274.

It is an arithmetic number, because the mean of its divisors is an integer number (272800).

2^1979925 is an apocalyptic number.

1979925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1979925 is a deficient number, since it is larger than the sum of its proper divisors (1293675).

1979925 is a wasteful number, since it uses less digits than its factorization.

1979925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26412 (or 26407 counting only the distinct ones).

The product of its digits is 51030, while the sum is 42.

The square root of 1979925 is about 1407.0980776051. The cubic root of 1979925 is about 125.5691380554.

The spelling of 1979925 in words is "one million, nine hundred seventy-nine thousand, nine hundred twenty-five".