742170491 has 2 divisors, whose sum is σ = 742170492. Its totient is φ = 742170490.

The previous prime is 742170437. The next prime is 742170503. The reversal of 742170491 is 194071247.

It is a strong prime.

It is an emirp because it is prime and its reverse (194071247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 742170491 - 2¹⁸ = 741908347 is a prime.

It is a super-2 number, since 2×742170491² = 1101634075422362162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (742170421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371085245 + 371085246.

It is an arithmetic number, because the mean of its divisors is an integer number (371085246).

Almost surely, 2^742170491 is an apocalyptic number.

742170491 is a deficient number, since it is larger than the sum of its proper divisors (1).

742170491 is an equidigital number, since it uses as much as digits as its factorization.

742170491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 742170491 is about 27242.8062247633. The cubic root of 742170491 is about 905.3876389508.

The spelling of 742170491 in words is "seven hundred forty-two million, one hundred seventy thousand, four hundred ninety-one".