1020772725 has 24 divisors (see below), whose sum is σ = 1928775360. Its totient is φ = 466638720.

The previous prime is 1020772721. The next prime is 1020772741. The reversal of 1020772725 is 5272770201.

It is not a de Polignac number, because 1020772725 - 2² = 1020772721 is a prime.

It is a super-2 number, since 2×1020772725² = 2083953912207851250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020772721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 971640 + ... + 972689.

It is an arithmetic number, because the mean of its divisors is an integer number (80365640).

Almost surely, 2^1020772725 is an apocalyptic number.

1020772725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020772725 is a deficient number, since it is larger than the sum of its proper divisors (908002635).

1020772725 is a wasteful number, since it uses less digits than its factorization.

1020772725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944349 (or 1944344 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 1020772725 is about 31949.5340341608. The cubic root of 1020772725 is about 1006.8768423025.

The spelling of 1020772725 in words is "one billion, twenty million, seven hundred seventy-two thousand, seven hundred twenty-five".