1011873825 has 18 divisors (see below), whose sum is σ = 1812378854. Its totient is φ = 539665920.

The previous prime is 1011873787. The next prime is 1011873839. The reversal of 1011873825 is 5283781101.

It can be written as a sum of positive squares in 3 ways, for example, as 326271969 + 685601856 = 18063^2 + 26184^2 .

It is not a de Polignac number, because 1011873825 - 2⁶ = 1011873761 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 1011873825.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2248384 + ... + 2248833.

Almost surely, 2^1011873825 is an apocalyptic number.

1011873825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1011873825 is a deficient number, since it is larger than the sum of its proper divisors (800505029).

1011873825 is a wasteful number, since it uses less digits than its factorization.

1011873825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497233 (or 4497225 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 1011873825 is about 31809.9642407847. The cubic root of 1011873825 is about 1003.9423788907.

The spelling of 1011873825 in words is "one billion, eleven million, eight hundred seventy-three thousand, eight hundred twenty-five".