1625421424 has 40 divisors (see below), whose sum is σ = 3616375680. Its totient is φ = 699940800.

The previous prime is 1625421401. The next prime is 1625421439. The reversal of 1625421424 is 4241245261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239692 + ... + 246379.

It is an arithmetic number, because the mean of its divisors is an integer number (90409392).

Almost surely, 2^1625421424 is an apocalyptic number.

It is an amenable number.

1625421424 is an abundant number, since it is smaller than the sum of its proper divisors (1990954256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1625421424 is a wasteful number, since it uses less digits than its factorization.

1625421424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486109 (or 486103 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 1625421424 is about 40316.5155240380. The cubic root of 1625421424 is about 1175.7689667549.

Adding to 1625421424 its reverse (4241245261), we get a palindrome (5866666685).

The spelling of 1625421424 in words is "one billion, six hundred twenty-five million, four hundred twenty-one thousand, four hundred twenty-four".