1025498879 has 4 divisors (see below), whose sum is σ = 1058579520. Its totient is φ = 992418240.

The previous prime is 1025498867. The next prime is 1025498897. The reversal of 1025498879 is 9788945201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1025498879 - 2⁴ = 1025498863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025498879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025498819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16540274 + ... + 16540335.

It is an arithmetic number, because the mean of its divisors is an integer number (264644880).

Almost surely, 2^1025498879 is an apocalyptic number.

1025498879 is a deficient number, since it is larger than the sum of its proper divisors (33080641).

1025498879 is an equidigital number, since it uses as much as digits as its factorization.

1025498879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33080640.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 1025498879 is about 32023.4114203968. The cubic root of 1025498879 is about 1008.4283890141.

The spelling of 1025498879 in words is "one billion, twenty-five million, four hundred ninety-eight thousand, eight hundred seventy-nine".