742491 has 6 divisors (see below), whose sum is σ = 1072500. Its totient is φ = 494988.

The previous prime is 742457. The next prime is 742499. The reversal of 742491 is 194247.

It is a happy number.

742491 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 742491 - 2¹⁰ = 741467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (742499) 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 5 ways as a sum of consecutive naturals, for example, 41241 + ... + 41258.

It is an arithmetic number, because the mean of its divisors is an integer number (178750).

2⁷⁴²⁴⁹¹ is an apocalyptic number.

742491 is a deficient number, since it is larger than the sum of its proper divisors (330009).

742491 is a wasteful number, since it uses less digits than its factorization.

742491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82505 (or 82502 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 742491 is about 861.6791746352. The cubic root of 742491 is about 90.5517951832.

The spelling of 742491 in words is "seven hundred forty-two thousand, four hundred ninety-one".