1025891965 has 32 divisors (see below), whose sum is σ = 1461888000. Its totient is φ = 676209408.

The previous prime is 1025891953. The next prime is 1025891987. The reversal of 1025891965 is 5691985201.

It is not a de Polignac number, because 1025891965 - 2¹⁹ = 1025367677 is a prime.

It is a super-2 number, since 2×1025891965² = 2104908647703122450, which contains 22 as substring.

It is a congruent number.

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, 240471 + ... + 244699.

It is an arithmetic number, because the mean of its divisors is an integer number (45684000).

Almost surely, 2^1025891965 is an apocalyptic number.

It is an amenable number.

1025891965 is a deficient number, since it is larger than the sum of its proper divisors (435996035).

1025891965 is a wasteful number, since it uses less digits than its factorization.

1025891965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509.

The product of its (nonzero) digits is 194400, while the sum is 46.

The square root of 1025891965 is about 32029.5483108957. The cubic root of 1025891965 is about 1008.5572201135.

The spelling of 1025891965 in words is "one billion, twenty-five million, eight hundred ninety-one thousand, nine hundred sixty-five".