1250321613 has 4 divisors (see below), whose sum is σ = 1667095488. Its totient is φ = 833547740.

The previous prime is 1250321599. The next prime is 1250321617. The reversal of 1250321613 is 3161230521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1250321613 - 2⁶ = 1250321549 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1250321617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208386933 + ... + 208386938.

It is an arithmetic number, because the mean of its divisors is an integer number (416773872).

Almost surely, 2^1250321613 is an apocalyptic number.

It is an amenable number.

1250321613 is a deficient number, since it is larger than the sum of its proper divisors (416773875).

1250321613 is an equidigital number, since it uses as much as digits as its factorization.

1250321613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416773874.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1250321613 is about 35359.8870614712. The cubic root of 1250321613 is about 1077.3097229876.

The spelling of 1250321613 in words is "one billion, two hundred fifty million, three hundred twenty-one thousand, six hundred thirteen".