1274749643157 has 4 divisors (see below), whose sum is σ = 1699666190880. Its totient is φ = 849833095436.

The previous prime is 1274749643147. The next prime is 1274749643173. The reversal of 1274749643157 is 7513469474721.

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 1274749643157 - 2²⁴ = 1274732865941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1274749643157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1274749643117) 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, 212458273857 + ... + 212458273862.

It is an arithmetic number, because the mean of its divisors is an integer number (424916547720).

Almost surely, 2^{1274749643157} is an apocalyptic number.

It is an amenable number.

1274749643157 is a deficient number, since it is larger than the sum of its proper divisors (424916547723).

1274749643157 is an equidigital number, since it uses as much as digits as its factorization.

1274749643157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424916547722.

The product of its digits is 35562240, while the sum is 60.

The spelling of 1274749643157 in words is "one trillion, two hundred seventy-four billion, seven hundred forty-nine million, six hundred forty-three thousand, one hundred fifty-seven".