1249199897 has 32 divisors (see below), whose sum is σ = 1507645440. Its totient is φ = 1021680000.

The previous prime is 1249199893. The next prime is 1249199927. The reversal of 1249199897 is 7989919421.

It is not a de Polignac number, because 1249199897 - 2² = 1249199893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1249199893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 724997 + ... + 726717.

It is an arithmetic number, because the mean of its divisors is an integer number (47113920).

Almost surely, 2^1249199897 is an apocalyptic number.

It is an amenable number.

1249199897 is a deficient number, since it is larger than the sum of its proper divisors (258445543).

1249199897 is a wasteful number, since it uses less digits than its factorization.

1249199897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925.

The product of its digits is 2939328, while the sum is 59.

The square root of 1249199897 is about 35344.0220829492. The cubic root of 1249199897 is about 1076.9874600060.

The spelling of 1249199897 in words is "one billion, two hundred forty-nine million, one hundred ninety-nine thousand, eight hundred ninety-seven".