1249045199 has 24 divisors (see below), whose sum is σ = 1456639200. Its totient is φ = 1065157632.

The previous prime is 1249045183. The next prime is 1249045201. The reversal of 1249045199 is 9915409421.

It is not a de Polignac number, because 1249045199 - 2⁴ = 1249045183 is a prime.

It is a super-2 number, since 2×1249045199² = 3120227818289899202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249045099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136727 + ... + 145575.

It is an arithmetic number, because the mean of its divisors is an integer number (60693300).

Almost surely, 2^1249045199 is an apocalyptic number.

1249045199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1249045199 is a deficient number, since it is larger than the sum of its proper divisors (207594001).

1249045199 is a wasteful number, since it uses less digits than its factorization.

1249045199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8927 (or 8908 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1249045199 is about 35341.8335545851. The cubic root of 1249045199 is about 1076.9430009662.

The spelling of 1249045199 in words is "one billion, two hundred forty-nine million, forty-five thousand, one hundred ninety-nine".