247902742 has 4 divisors (see below), whose sum is σ = 371854116. Its totient is φ = 123951370.

The previous prime is 247902737. The next prime is 247902749. The reversal of 247902742 is 247209742.

247902742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×247902742² = 122911538982237128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247902749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61975684 + ... + 61975687.

It is an arithmetic number, because the mean of its divisors is an integer number (92963529).

Almost surely, 2^247902742 is an apocalyptic number.

247902742 is a deficient number, since it is larger than the sum of its proper divisors (123951374).

247902742 is a wasteful number, since it uses less digits than its factorization.

247902742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123951373.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 247902742 is about 15744.9275006270. The cubic root of 247902742 is about 628.1939895247.

The spelling of 247902742 in words is "two hundred forty-seven million, nine hundred two thousand, seven hundred forty-two".