42879951 has 12 divisors (see below), whose sum is σ = 64073880. Its totient is φ = 27600720.

The previous prime is 42879943. The next prime is 42879959. The reversal of 42879951 is 15997824.

It is an interprime number because it is at equal distance from previous prime (42879943) and next prime (42879959).

It is not a de Polignac number, because 42879951 - 2³ = 42879943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42879897 and 42879906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42879959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81885 + ... + 82406.

It is an arithmetic number, because the mean of its divisors is an integer number (5339490).

Almost surely, 2^42879951 is an apocalyptic number.

42879951 is a deficient number, since it is larger than the sum of its proper divisors (21193929).

42879951 is a wasteful number, since it uses less digits than its factorization.

42879951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164326 (or 164323 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 42879951 is about 6548.2784760577. The cubic root of 42879951 is about 350.0134715903.

The spelling of 42879951 in words is "forty-two million, eight hundred seventy-nine thousand, nine hundred fifty-one".