742505247 has 18 divisors (see below), whose sum is σ = 1178873696. Its totient is φ = 450002520.

The previous prime is 742505227. The next prime is 742505287.

It is a happy number.

742505247 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 742505247 - 2²⁰ = 741456671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742505227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 339823 + ... + 342000.

Almost surely, 2^742505247 is an apocalyptic number.

742505247 is a deficient number, since it is larger than the sum of its proper divisors (436368449).

742505247 is a wasteful number, since it uses less digits than its factorization.

742505247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681851 (or 681837 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 742505247 is about 27248.9494659886. The cubic root of 742505247 is about 905.5237435211.

It can be divided in two parts, 74250 and 5247, that added together give a palindrome (79497).

The spelling of 742505247 in words is "seven hundred forty-two million, five hundred five thousand, two hundred forty-seven".