1271860051 has 16 divisors (see below), whose sum is σ = 1588025088. Its totient is φ = 989604000.

The previous prime is 1271860043. The next prime is 1271860081. The reversal of 1271860051 is 1500681721.

It is not a de Polignac number, because 1271860051 - 2³ = 1271860043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1271859995 and 1271860022.

It is not an unprimeable number, because it can be changed into a prime (1271860001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42196 + ... + 65758.

It is an arithmetic number, because the mean of its divisors is an integer number (99251568).

Almost surely, 2^1271860051 is an apocalyptic number.

1271860051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1271860051 is a deficient number, since it is larger than the sum of its proper divisors (316165037).

1271860051 is a wasteful number, since it uses less digits than its factorization.

1271860051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24282.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 1271860051 is about 35663.1469587304. The cubic root of 1271860051 is about 1083.4605649594.

The spelling of 1271860051 in words is "one billion, two hundred seventy-one million, eight hundred sixty thousand, fifty-one".