42279861 has 16 divisors (see below), whose sum is σ = 61568640. Its totient is φ = 25650240.

The previous prime is 42279859. The next prime is 42279907. The reversal of 42279861 is 16897224.

It is not a de Polignac number, because 42279861 - 2¹ = 42279859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42279851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4866 + ... + 10403.

It is an arithmetic number, because the mean of its divisors is an integer number (3848040).

Almost surely, 2^42279861 is an apocalyptic number.

It is an amenable number.

42279861 is a deficient number, since it is larger than the sum of its proper divisors (19288779).

42279861 is a wasteful number, since it uses less digits than its factorization.

42279861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15356.

The product of its digits is 48384, while the sum is 39.

The square root of 42279861 is about 6502.2965942811. The cubic root of 42279861 is about 348.3730228553.

The spelling of 42279861 in words is "forty-two million, two hundred seventy-nine thousand, eight hundred sixty-one".