1249154881 has 16 divisors (see below), whose sum is σ = 1357171200. Its totient is φ = 1149689424.

The previous prime is 1249154857. The next prime is 1249154887. The reversal of 1249154881 is 1884519421.

It is not a de Polignac number, because 1249154881 - 2²³ = 1240766273 is a prime.

It is a super-2 number, since 2×1249154881² = 3120775833452248322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249154887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051770 + ... + 1052956.

It is an arithmetic number, because the mean of its divisors is an integer number (84823200).

Almost surely, 2^1249154881 is an apocalyptic number.

It is an amenable number.

1249154881 is a deficient number, since it is larger than the sum of its proper divisors (108016319).

1249154881 is an equidigital number, since it uses as much as digits as its factorization.

1249154881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705 (or 1679 counting only the distinct ones).

The product of its digits is 92160, while the sum is 43.

The square root of 1249154881 is about 35343.3852509915. The cubic root of 1249154881 is about 1076.9745231254.

The spelling of 1249154881 in words is "one billion, two hundred forty-nine million, one hundred fifty-four thousand, eight hundred eighty-one".