742641 has 4 divisors (see below), whose sum is σ = 990192. Its totient is φ = 495092.

The previous prime is 742619. The next prime is 742657. The reversal of 742641 is 146247.

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 not a de Polignac number, because 742641 - 2⁷ = 742513 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (742681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123771 + ... + 123776.

It is an arithmetic number, because the mean of its divisors is an integer number (247548).

2⁷⁴²⁶⁴¹ is an apocalyptic number.

It is an amenable number.

742641 is a deficient number, since it is larger than the sum of its proper divisors (247551).

742641 is a wasteful number, since it uses less digits than its factorization.

742641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247550.

The product of its digits is 1344, while the sum is 24.

The square root of 742641 is about 861.7662095952. The cubic root of 742641 is about 90.5578926105.

Adding to 742641 its reverse (146247), we get a palindrome (888888).

The spelling of 742641 in words is "seven hundred forty-two thousand, six hundred forty-one".