42170624 has 18 divisors (see below), whose sum is σ = 84177030. Its totient is φ = 21085184.

The previous prime is 42170599. The next prime is 42170627. The reversal of 42170624 is 42607124.

42170624 = T₁₂₂ + T₁₂₃ + ... + T₆₃₃.

It can be written as a sum of positive squares in only one way, i.e., 35617024 + 6553600 = 5968^2 + 2560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42170593 and 42170602.

It is not an unprimeable number, because it can be changed into a prime (42170627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82109 + ... + 82620.

Almost surely, 2^42170624 is an apocalyptic number.

It is an amenable number.

42170624 is a deficient number, since it is larger than the sum of its proper divisors (42006406).

42170624 is an equidigital number, since it uses as much as digits as its factorization.

42170624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164745 (or 164731 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 42170624 is about 6493.8912833524. The cubic root of 42170624 is about 348.0727376912.

Adding to 42170624 its reverse (42607124), we get a palindrome (84777748).

The spelling of 42170624 in words is "forty-two million, one hundred seventy thousand, six hundred twenty-four".