742238641 has 4 divisors (see below), whose sum is σ = 743953252. Its totient is φ = 740524032.

The previous prime is 742238633. The next prime is 742238657. The reversal of 742238641 is 146832247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145902241 + 596336400 = 12079^2 + 24420^2 .

It is a cyclic number.

It is not a de Polignac number, because 742238641 - 2³ = 742238633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 742238641.

It is not an unprimeable number, because it can be changed into a prime (742238671) 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, 856656 + ... + 857521.

It is an arithmetic number, because the mean of its divisors is an integer number (185988313).

Almost surely, 2^742238641 is an apocalyptic number.

It is an amenable number.

742238641 is a deficient number, since it is larger than the sum of its proper divisors (1714611).

742238641 is a wasteful number, since it uses less digits than its factorization.

742238641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714610.

The product of its digits is 64512, while the sum is 37.

The square root of 742238641 is about 27244.0569849646. The cubic root of 742238641 is about 905.4153505884.

The spelling of 742238641 in words is "seven hundred forty-two million, two hundred thirty-eight thousand, six hundred forty-one".