247747742 has 12 divisors (see below), whose sum is σ = 408477048. Its totient is φ = 112612500.

The previous prime is 247747741. The next prime is 247747751.

247747742 is nontrivially palindromic in base 10.

247747742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247747742² = 122757887332197128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247747693 and 247747702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247747741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 511634 + ... + 512117.

It is an arithmetic number, because the mean of its divisors is an integer number (34039754).

Almost surely, 2^247747742 is an apocalyptic number.

247747742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

247747742 is a deficient number, since it is larger than the sum of its proper divisors (160729306).

247747742 is a wasteful number, since it uses less digits than its factorization.

247747742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023775 (or 1023764 counting only the distinct ones).

The product of its digits is 614656, while the sum is 44.

The square root of 247747742 is about 15740.0045107999. The cubic root of 247747742 is about 628.0630371358.

The spelling of 247747742 in words is "two hundred forty-seven million, seven hundred forty-seven thousand, seven hundred forty-two".