742593221 has 4 divisors (see below), whose sum is σ = 744144000. Its totient is φ = 741042444.

The previous prime is 742593217. The next prime is 742593223. The reversal of 742593221 is 122395247.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122395247 = 13 ⋅9415019.

It is a cyclic number.

It is not a de Polignac number, because 742593221 - 2² = 742593217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742593223) 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, 774671 + ... + 775628.

It is an arithmetic number, because the mean of its divisors is an integer number (186036000).

Almost surely, 2^742593221 is an apocalyptic number.

It is an amenable number.

742593221 is a deficient number, since it is larger than the sum of its proper divisors (1550779).

742593221 is a wasteful number, since it uses less digits than its factorization.

742593221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550778.

The product of its digits is 30240, while the sum is 35.

The square root of 742593221 is about 27250.5636822433. The cubic root of 742593221 is about 905.5595050640.

The spelling of 742593221 in words is "seven hundred forty-two million, five hundred ninety-three thousand, two hundred twenty-one".