42251624 has 16 divisors (see below), whose sum is σ = 79431300. Its totient is φ = 21069952.

The previous prime is 42251623. The next prime is 42251639. The reversal of 42251624 is 42615224.

It can be written as a sum of positive squares in 2 ways, for example, as 41190724 + 1060900 = 6418^2 + 1030^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42251593 and 42251602.

It is not an unprimeable number, because it can be changed into a prime (42251623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3677 + ... + 9900.

Almost surely, 2^42251624 is an apocalyptic number.

It is an amenable number.

42251624 is a deficient number, since it is larger than the sum of its proper divisors (37179676).

42251624 is a wasteful number, since it uses less digits than its factorization.

42251624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13972 (or 13968 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 42251624 is about 6500.1249218765. The cubic root of 42251624 is about 348.2954508582.

Adding to 42251624 its reverse (42615224), we get a palindrome (84866848).

It can be divided in two parts, 42251 and 624, that added together give a cube (42875 = 35³).

The spelling of 42251624 in words is "forty-two million, two hundred fifty-one thousand, six hundred twenty-four".