1025403855 has 16 divisors (see below), whose sum is σ = 1875024384. Its totient is φ = 468756000.

The previous prime is 1025403851. The next prime is 1025403857. The reversal of 1025403855 is 5583045201.

It is not a de Polignac number, because 1025403855 - 2² = 1025403851 is a prime.

It is a super-2 number, since 2×1025403855² = 2102906131697722050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025403851) 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, 4882771 + ... + 4882980.

It is an arithmetic number, because the mean of its divisors is an integer number (117189024).

Almost surely, 2^1025403855 is an apocalyptic number.

1025403855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1025403855 is a deficient number, since it is larger than the sum of its proper divisors (849620529).

1025403855 is an equidigital number, since it uses as much as digits as its factorization.

1025403855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9765766.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 1025403855 is about 32021.9277214849. The cubic root of 1025403855 is about 1008.3972406429.

The spelling of 1025403855 in words is "one billion, twenty-five million, four hundred three thousand, eight hundred fifty-five".