742152581 has 4 divisors (see below), whose sum is σ = 743239872. Its totient is φ = 741065292.

The previous prime is 742152571. The next prime is 742152583. The reversal of 742152581 is 185251247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742152581 is a prime.

It is a super-2 number, since 2×742152581² = 1101580906969923122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742152583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542621 + ... + 543986.

It is an arithmetic number, because the mean of its divisors is an integer number (185809968).

Almost surely, 2^742152581 is an apocalyptic number.

It is an amenable number.

742152581 is a deficient number, since it is larger than the sum of its proper divisors (1087291).

742152581 is a wasteful number, since it uses less digits than its factorization.

742152581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087290.

The product of its digits is 22400, while the sum is 35.

The square root of 742152581 is about 27242.4775121500. The cubic root of 742152581 is about 905.3803559778.

The spelling of 742152581 in words is "seven hundred forty-two million, one hundred fifty-two thousand, five hundred eighty-one".