1250661345 has 16 divisors (see below), whose sum is σ = 2033863872. Its totient is φ = 656084160.

The previous prime is 1250661343. The next prime is 1250661359. The reversal of 1250661345 is 5431660521.

It is not a de Polignac number, because 1250661345 - 2¹ = 1250661343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1250661341) 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, 682507 + ... + 684336.

It is an arithmetic number, because the mean of its divisors is an integer number (127116492).

Almost surely, 2^1250661345 is an apocalyptic number.

1250661345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1250661345 is a deficient number, since it is larger than the sum of its proper divisors (783202527).

1250661345 is a wasteful number, since it uses less digits than its factorization.

1250661345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366912.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1250661345 is about 35364.6906532490. The cubic root of 1250661345 is about 1077.4072881364.

The spelling of 1250661345 in words is "one billion, two hundred fifty million, six hundred sixty-one thousand, three hundred forty-five".