42979225 has 12 divisors (see below), whose sum is σ = 53795664. Its totient is φ = 34059920.

The previous prime is 42979219. The next prime is 42979241. The reversal of 42979225 is 52297924.

It is not a de Polignac number, because 42979225 - 2¹⁵ = 42946457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5359 + ... + 10708.

It is an arithmetic number, because the mean of its divisors is an integer number (4482972).

Almost surely, 2^42979225 is an apocalyptic number.

It is an amenable number.

42979225 is a deficient number, since it is larger than the sum of its proper divisors (10816439).

42979225 is a wasteful number, since it uses less digits than its factorization.

42979225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16184 (or 16179 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 42979225 is about 6555.8542540237. The cubic root of 42979225 is about 350.2833759462.

The spelling of 42979225 in words is "forty-two million, nine hundred seventy-nine thousand, two hundred twenty-five".