7125979 has 4 divisors (see below), whose sum is σ = 8143984. Its totient is φ = 6107976.

The previous prime is 7125973. The next prime is 7125983. The reversal of 7125979 is 9795217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9795217 = 23 ⋅425879.

It is not a de Polignac number, because 7125979 - 2³ = 7125971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7125971) 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, 508992 + ... + 509005.

It is an arithmetic number, because the mean of its divisors is an integer number (2035996).

Almost surely, 2^7125979 is an apocalyptic number.

7125979 is a deficient number, since it is larger than the sum of its proper divisors (1018005).

7125979 is a wasteful number, since it uses less digits than its factorization.

7125979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018004.

The product of its digits is 39690, while the sum is 40.

The square root of 7125979 is about 2669.4529402108. The cubic root of 7125979 is about 192.4338694529.

The spelling of 7125979 in words is "seven million, one hundred twenty-five thousand, nine hundred seventy-nine".