742055557 has 2 divisors, whose sum is σ = 742055558. Its totient is φ = 742055556.

The previous prime is 742055549. The next prime is 742055563. The reversal of 742055557 is 755550247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733001476 + 9054081 = 27074^2 + 3009^2 .

It is a cyclic number.

It is not a de Polignac number, because 742055557 - 2³ = 742055549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742055537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371027778 + 371027779.

It is an arithmetic number, because the mean of its divisors is an integer number (371027779).

Almost surely, 2^742055557 is an apocalyptic number.

It is an amenable number.

742055557 is a deficient number, since it is larger than the sum of its proper divisors (1).

742055557 is an equidigital number, since it uses as much as digits as its factorization.

742055557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 245000, while the sum is 40.

The square root of 742055557 is about 27240.6967054809. The cubic root of 742055557 is about 905.3408998272.

The spelling of 742055557 in words is "seven hundred forty-two million, fifty-five thousand, five hundred fifty-seven".