247121742 has 32 divisors (see below), whose sum is σ = 580119552. Its totient is φ = 68697504.

The previous prime is 247121737. The next prime is 247121783.

247121742 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×247121742² = 122138310738229128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77958 + ... + 81065.

It is an arithmetic number, because the mean of its divisors is an integer number (18128736).

Almost surely, 2^247121742 is an apocalyptic number.

247121742 is an abundant number, since it is smaller than the sum of its proper divisors (332997810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247121742 is a wasteful number, since it uses less digits than its factorization.

247121742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159072.

The product of its digits is 6272, while the sum is 30.

The square root of 247121742 is about 15720.1062973505. The cubic root of 247121742 is about 627.5336020058.

The spelling of 247121742 in words is "two hundred forty-seven million, one hundred twenty-one thousand, seven hundred forty-two".