1139421525 has 48 divisors (see below), whose sum is σ = 2102960640. Its totient is φ = 539582400.

The previous prime is 1139421499. The next prime is 1139421527. The reversal of 1139421525 is 5251249311.

It is a happy number.

It is not a de Polignac number, because 1139421525 - 2²⁸ = 870986069 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139421527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19416 + ... + 51534.

It is an arithmetic number, because the mean of its divisors is an integer number (43811680).

Almost surely, 2^1139421525 is an apocalyptic number.

1139421525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1139421525 is a deficient number, since it is larger than the sum of its proper divisors (963539115).

1139421525 is a wasteful number, since it uses less digits than its factorization.

1139421525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32186 (or 32181 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 1139421525 is about 33755.3184698352. The cubic root of 1139421525 is about 1044.4672009046.

The spelling of 1139421525 in words is "one billion, one hundred thirty-nine million, four hundred twenty-one thousand, five hundred twenty-five".