1021888625 has 32 divisors (see below), whose sum is σ = 1297296000. Its totient is φ = 803563200.

The previous prime is 1021888591. The next prime is 1021888661. The reversal of 1021888625 is 5268881201.

It is a happy number.

1021888625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021888625 - 2⁸ = 1021888369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2438666 + ... + 2439084.

It is an arithmetic number, because the mean of its divisors is an integer number (40540500).

Almost surely, 2^1021888625 is an apocalyptic number.

It is an amenable number.

1021888625 is a deficient number, since it is larger than the sum of its proper divisors (275407375).

1021888625 is a wasteful number, since it uses less digits than its factorization.

1021888625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 41.

The square root of 1021888625 is about 31966.9927425149. The cubic root of 1021888625 is about 1007.2436117319.

The spelling of 1021888625 in words is "one billion, twenty-one million, eight hundred eighty-eight thousand, six hundred twenty-five".