42279225 has 12 divisors (see below), whose sum is σ = 69901776. Its totient is φ = 22548880.

The previous prime is 42279203. The next prime is 42279253. The reversal of 42279225 is 52297224.

It is not a de Polignac number, because 42279225 - 2¹⁷ = 42148153 is a prime.

It is a Curzon 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, 281787 + ... + 281936.

It is an arithmetic number, because the mean of its divisors is an integer number (5825148).

Almost surely, 2^42279225 is an apocalyptic number.

It is an amenable number.

42279225 is a deficient number, since it is larger than the sum of its proper divisors (27622551).

42279225 is a wasteful number, since it uses less digits than its factorization.

42279225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563736 (or 563731 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 42279225 is about 6502.2476882998. The cubic root of 42279225 is about 348.3712760319.

The spelling of 42279225 in words is "forty-two million, two hundred seventy-nine thousand, two hundred twenty-five".