1145125251 has 6 divisors (see below), whose sum is σ = 1654069820. Its totient is φ = 763416828.

The previous prime is 1145125183. The next prime is 1145125259. The reversal of 1145125251 is 1525215411.

It is a happy number.

It is not a de Polignac number, because 1145125251 - 2³⁰ = 71383427 is a prime.

It is a super-2 number, since 2×1145125251² = 2622623680955626002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145125259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63618061 + ... + 63618078.

Almost surely, 2^1145125251 is an apocalyptic number.

1145125251 is a deficient number, since it is larger than the sum of its proper divisors (508944569).

1145125251 is a wasteful number, since it uses less digits than its factorization.

1145125251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127236145 (or 127236142 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1145125251 is about 33839.6993337707. The cubic root of 1145125251 is about 1046.2071018669.

The spelling of 1145125251 in words is "one billion, one hundred forty-five million, one hundred twenty-five thousand, two hundred fifty-one".