1249136147 has 8 divisors (see below), whose sum is σ = 1433820000. Its totient is φ = 1066011264.

The previous prime is 1249136137. The next prime is 1249136179. The reversal of 1249136147 is 7416319421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1249136147 - 2⁴ = 1249136131 is a prime.

It is a super-2 number, since 2×1249136147² = 3120682227484011218, which contains 22 as substring.

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 1249136147.

It is not an unprimeable number, because it can be changed into a prime (1249136137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388022 + ... + 391227.

It is an arithmetic number, because the mean of its divisors is an integer number (179227500).

Almost surely, 2^1249136147 is an apocalyptic number.

1249136147 is a deficient number, since it is larger than the sum of its proper divisors (184683853).

1249136147 is an equidigital number, since it uses as much as digits as its factorization.

1249136147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779485.

The product of its digits is 36288, while the sum is 38.

The square root of 1249136147 is about 35343.1202216216. The cubic root of 1249136147 is about 1076.9691391809.

The spelling of 1249136147 in words is "one billion, two hundred forty-nine million, one hundred thirty-six thousand, one hundred forty-seven".