1274749643173 has 2 divisors, whose sum is σ = 1274749643174. Its totient is φ = 1274749643172.

The previous prime is 1274749643147. The next prime is 1274749643197. The reversal of 1274749643173 is 3713469474721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095754649089 + 178994994084 = 1046783^2 + 423078^2 .

It is a cyclic number.

It is not a de Polignac number, because 1274749643173 - 2²⁵ = 1274716088741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1274749643143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637374821586 + 637374821587.

It is an arithmetic number, because the mean of its divisors is an integer number (637374821587).

Almost surely, 2^{1274749643173} is an apocalyptic number.

It is an amenable number.

1274749643173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1274749643173 is an equidigital number, since it uses as much as digits as its factorization.

1274749643173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 58.

The spelling of 1274749643173 in words is "one trillion, two hundred seventy-four billion, seven hundred forty-nine million, six hundred forty-three thousand, one hundred seventy-three".