742212749 has 2 divisors, whose sum is σ = 742212750. Its totient is φ = 742212748.

The previous prime is 742212739. The next prime is 742212769. The reversal of 742212749 is 947212247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646074724 + 96138025 = 25418^2 + 9805^2 .

It is a cyclic number.

It is not a de Polignac number, because 742212749 - 2⁴ = 742212733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742212739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371106374 + 371106375.

It is an arithmetic number, because the mean of its divisors is an integer number (371106375).

Almost surely, 2^742212749 is an apocalyptic number.

It is an amenable number.

742212749 is a deficient number, since it is larger than the sum of its proper divisors (1).

742212749 is an equidigital number, since it uses as much as digits as its factorization.

742212749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 742212749 is about 27243.5817946172. The cubic root of 742212749 is about 905.4048223991.

The spelling of 742212749 in words is "seven hundred forty-two million, two hundred twelve thousand, seven hundred forty-nine".