742412123581 has 2 divisors, whose sum is σ = 742412123582. Its totient is φ = 742412123580.

The previous prime is 742412123539. The next prime is 742412123617. The reversal of 742412123581 is 185321214247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375732220900 + 366679902681 = 612970^2 + 605541^2 .

It is a cyclic number.

It is not a de Polignac number, because 742412123581 - 2²¹ = 742410026429 is a prime.

It is a super-2 number, since 2×742412123581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742413123581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371206061790 + 371206061791.

It is an arithmetic number, because the mean of its divisors is an integer number (371206061791).

Almost surely, 2^742412123581 is an apocalyptic number.

It is an amenable number.

742412123581 is a deficient number, since it is larger than the sum of its proper divisors (1).

742412123581 is an equidigital number, since it uses as much as digits as its factorization.

742412123581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The spelling of 742412123581 in words is "seven hundred forty-two billion, four hundred twelve million, one hundred twenty-three thousand, five hundred eighty-one".