1320501951 has 24 divisors (see below), whose sum is σ = 1942911360. Its totient is φ = 863990736.

The previous prime is 1320501937. The next prime is 1320501997. The reversal of 1320501951 is 1591050231.

It is not a de Polignac number, because 1320501951 - 2⁶ = 1320501887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320501551) 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, 392860 + ... + 396206.

It is an arithmetic number, because the mean of its divisors is an integer number (80954640).

Almost surely, 2^1320501951 is an apocalyptic number.

1320501951 is a deficient number, since it is larger than the sum of its proper divisors (622409409).

1320501951 is a wasteful number, since it uses less digits than its factorization.

1320501951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155 (or 4152 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 1320501951 is about 36338.7114658734. The cubic root of 1320501951 is about 1097.1003385288.

The spelling of 1320501951 in words is "one billion, three hundred twenty million, five hundred one thousand, nine hundred fifty-one".