1131420139 has 2 divisors, whose sum is σ = 1131420140. Its totient is φ = 1131420138.

The previous prime is 1131420137. The next prime is 1131420149. The reversal of 1131420139 is 9310241311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131420139 - 2¹ = 1131420137 is a prime.

It is a super-2 number, since 2×1131420139² = 2560223061869558642, which contains 22 as substring.

Together with 1131420137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1131420137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565710069 + 565710070.

It is an arithmetic number, because the mean of its divisors is an integer number (565710070).

Almost surely, 2^1131420139 is an apocalyptic number.

1131420139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131420139 is an equidigital number, since it uses as much as digits as its factorization.

1131420139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1131420139 is about 33636.5892890465. The cubic root of 1131420139 is about 1042.0165935812.

The spelling of 1131420139 in words is "one billion, one hundred thirty-one million, four hundred twenty thousand, one hundred thirty-nine".