1261120034515 has 32 divisors (see below), whose sum is σ = 1652746564800. Its totient is φ = 916164587520.

The previous prime is 1261120034507. The next prime is 1261120034557. The reversal of 1261120034515 is 5154300211621.

It is not a de Polignac number, because 1261120034515 - 2³ = 1261120034507 is a prime.

It is a super-2 number, since 2×1261120034515² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357357271 + ... + 357360799.

It is an arithmetic number, because the mean of its divisors is an integer number (51648330150).

Almost surely, 2^{1261120034515} is an apocalyptic number.

1261120034515 is a deficient number, since it is larger than the sum of its proper divisors (391626530285).

1261120034515 is a wasteful number, since it uses less digits than its factorization.

1261120034515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8887.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 1261120034515 in words is "one trillion, two hundred sixty-one billion, one hundred twenty million, thirty-four thousand, five hundred fifteen".