1374461991421 has 2 divisors, whose sum is σ = 1374461991422. Its totient is φ = 1374461991420.

The previous prime is 1374461991403. The next prime is 1374461991451. The reversal of 1374461991421 is 1241991644731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287782388025 + 86679603396 = 1134805^2 + 294414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1374461991421 - 2¹⁷ = 1374461860349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1374461991401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687230995710 + 687230995711.

It is an arithmetic number, because the mean of its divisors is an integer number (687230995711).

Almost surely, 2^{1374461991421} is an apocalyptic number.

It is an amenable number.

1374461991421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1374461991421 is an equidigital number, since it uses as much as digits as its factorization.

1374461991421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The spelling of 1374461991421 in words is "one trillion, three hundred seventy-four billion, four hundred sixty-one million, nine hundred ninety-one thousand, four hundred twenty-one".