1250971249 has 16 divisors (see below), whose sum is σ = 1378321920. Its totient is φ = 1125938560.

The previous prime is 1250971237. The next prime is 1250971259. The reversal of 1250971249 is 9421790521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1250971249 - 2²¹ = 1248874097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250971259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720987 + ... + 722719.

It is an arithmetic number, because the mean of its divisors is an integer number (86145120).

Almost surely, 2^1250971249 is an apocalyptic number.

It is an amenable number.

1250971249 is a deficient number, since it is larger than the sum of its proper divisors (127350671).

1250971249 is a wasteful number, since it uses less digits than its factorization.

1250971249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1250971249 is about 35369.0719273209. The cubic root of 1250971249 is about 1077.4962717916.

The spelling of 1250971249 in words is "one billion, two hundred fifty million, nine hundred seventy-one thousand, two hundred forty-nine".