1245159139 has 12 divisors (see below), whose sum is σ = 1452573864. Its totient is φ = 1064241024.

The previous prime is 1245159103. The next prime is 1245159173. The reversal of 1245159139 is 9319515421.

It is not a de Polignac number, because 1245159139 - 2⁷ = 1245159011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245151139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18697 + ... + 53290.

It is an arithmetic number, because the mean of its divisors is an integer number (121047822).

Almost surely, 2^1245159139 is an apocalyptic number.

1245159139 is a deficient number, since it is larger than the sum of its proper divisors (207414725).

1245159139 is an equidigital number, since it uses as much as digits as its factorization.

1245159139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72354 (or 72347 counting only the distinct ones).

The product of its digits is 48600, while the sum is 40.

The square root of 1245159139 is about 35286.8125366970. The cubic root of 1245159139 is about 1075.8249702056.

The spelling of 1245159139 in words is "one billion, two hundred forty-five million, one hundred fifty-nine thousand, one hundred thirty-nine".