1260521980417 has 4 divisors (see below), whose sum is σ = 1440596549056. Its totient is φ = 1080447411780.

The previous prime is 1260521980369. The next prime is 1260521980453. The reversal of 1260521980417 is 7140891250621.

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 1260521980417 - 2¹⁵ = 1260521947649 is a prime.

It is a super-2 number, since 2×1260521980417² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1260521980117) 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, 90037284309 + ... + 90037284322.

It is an arithmetic number, because the mean of its divisors is an integer number (360149137264).

Almost surely, 2^{1260521980417} is an apocalyptic number.

It is an amenable number.

1260521980417 is a deficient number, since it is larger than the sum of its proper divisors (180074568639).

1260521980417 is an equidigital number, since it uses as much as digits as its factorization.

1260521980417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180074568638.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 1260521980417 in words is "one trillion, two hundred sixty billion, five hundred twenty-one million, nine hundred eighty thousand, four hundred seventeen".