1254039370891 has 4 divisors (see below), whose sum is σ = 1254059809072. Its totient is φ = 1254018932712.

The previous prime is 1254039370877. The next prime is 1254039370901. The reversal of 1254039370891 is 1980739304521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1254039370891 - 2³⁷ = 1116600417419 is a prime.

It is a super-2 number, since 2×1254039370891² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1254039370691) 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, 10126776 + ... + 10249861.

It is an arithmetic number, because the mean of its divisors is an integer number (313514952268).

Almost surely, 2^{1254039370891} is an apocalyptic number.

1254039370891 is a deficient number, since it is larger than the sum of its proper divisors (20438181).

1254039370891 is an equidigital number, since it uses as much as digits as its factorization.

1254039370891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20438180.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 1254039370891 in words is "one trillion, two hundred fifty-four billion, thirty-nine million, three hundred seventy thousand, eight hundred ninety-one".