1025621255 has 16 divisors (see below), whose sum is σ = 1246635264. Its totient is φ = 809948160.

The previous prime is 1025621239. The next prime is 1025621297. The reversal of 1025621255 is 5521265201.

It is not a de Polignac number, because 1025621255 - 2⁴ = 1025621239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201674 + ... + 206696.

It is an arithmetic number, because the mean of its divisors is an integer number (77914704).

Almost surely, 2^1025621255 is an apocalyptic number.

1025621255 is a deficient number, since it is larger than the sum of its proper divisors (221014009).

1025621255 is an equidigital number, since it uses as much as digits as its factorization.

1025621255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1025621255 is about 32025.3220904958. The cubic root of 1025621255 is about 1008.4685003935.

Adding to 1025621255 its reverse (5521265201), we get a palindrome (6546886456).

The spelling of 1025621255 in words is "one billion, twenty-five million, six hundred twenty-one thousand, two hundred fifty-five".