1025672991 has 16 divisors (see below), whose sum is σ = 1645190400. Its totient is φ = 555251328.

The previous prime is 1025672987. The next prime is 1025673001. The reversal of 1025672991 is 1992765201.

It is not a de Polignac number, because 1025672991 - 2² = 1025672987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025672891) 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, 1284906 + ... + 1285703.

It is an arithmetic number, because the mean of its divisors is an integer number (102824400).

Almost surely, 2^1025672991 is an apocalyptic number.

1025672991 is a deficient number, since it is larger than the sum of its proper divisors (619517409).

1025672991 is a wasteful number, since it uses less digits than its factorization.

1025672991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570638.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 1025672991 is about 32026.1298161361. The cubic root of 1025672991 is about 1008.4854570263.

The spelling of 1025672991 in words is "one billion, twenty-five million, six hundred seventy-two thousand, nine hundred ninety-one".