742040247 has 16 divisors (see below), whose sum is σ = 1072289120. Its totient is φ = 453727872.

The previous prime is 742040239. The next prime is 742040249.

742040247 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 742040247 - 2³ = 742040239 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 (742040249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54472 + ... + 66717.

It is an arithmetic number, because the mean of its divisors is an integer number (67018070).

Almost surely, 2^742040247 is an apocalyptic number.

742040247 is a deficient number, since it is larger than the sum of its proper divisors (330248873).

742040247 is a wasteful number, since it uses less digits than its factorization.

742040247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121362.

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 742040247 is about 27240.4156906608. The cubic root of 742040247 is about 905.3346734899.

The spelling of 742040247 in words is "seven hundred forty-two million, forty thousand, two hundred forty-seven".