1025921663 has 8 divisors (see below), whose sum is σ = 1162988400. Its totient is φ = 897162048.

The previous prime is 1025921651. The next prime is 1025921669. The reversal of 1025921663 is 3661295201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025921663 - 2¹² = 1025917567 is a prime.

It is a super-2 number, since 2×1025921663² = 2105030517225371138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025921669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2076518 + ... + 2077011.

It is an arithmetic number, because the mean of its divisors is an integer number (145373550).

Almost surely, 2^1025921663 is an apocalyptic number.

1025921663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1025921663 is a deficient number, since it is larger than the sum of its proper divisors (137066737).

1025921663 is a wasteful number, since it uses less digits than its factorization.

1025921663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153561.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1025921663 is about 32030.0119107065. The cubic root of 1025921663 is about 1008.5669520815.

The spelling of 1025921663 in words is "one billion, twenty-five million, nine hundred twenty-one thousand, six hundred sixty-three".