1181396051 has 16 divisors (see below), whose sum is σ = 1342303488. Its totient is φ = 1030226400.

The previous prime is 1181396033. The next prime is 1181396053. The reversal of 1181396051 is 1506931811.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1181396051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181396053) 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, 8456 + ... + 49338.

It is an arithmetic number, because the mean of its divisors is an integer number (83893968).

Almost surely, 2^1181396051 is an apocalyptic number.

1181396051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1181396051 is a deficient number, since it is larger than the sum of its proper divisors (160907437).

1181396051 is a wasteful number, since it uses less digits than its factorization.

1181396051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41002.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 1181396051 is about 34371.4423759027. The cubic root of 1181396051 is about 1057.1383747879.

The spelling of 1181396051 in words is "one billion, one hundred eighty-one million, three hundred ninety-six thousand, fifty-one".