1025215660 has 48 divisors (see below), whose sum is σ = 2520544320. Its totient is φ = 342927360.

The previous prime is 1025215649. The next prime is 1025215669. The reversal of 1025215660 is 665125201.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1025215669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83565 + ... + 95044.

It is an arithmetic number, because the mean of its divisors is an integer number (52511340).

Almost surely, 2^1025215660 is an apocalyptic number.

1025215660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025215660 is an abundant number, since it is smaller than the sum of its proper divisors (1495328660).

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

1025215660 is a wasteful number, since it uses less digits than its factorization.

1025215660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178666 (or 178664 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1025215660 is about 32018.9890533727. The cubic root of 1025215660 is about 1008.3355456242.

The spelling of 1025215660 in words is "one billion, twenty-five million, two hundred fifteen thousand, six hundred sixty".