247795642 has 8 divisors (see below), whose sum is σ = 374188500. Its totient is φ = 123066144.

The previous prime is 247795637. The next prime is 247795651. The reversal of 247795642 is 246597742.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 238980681 + 8814961 = 15459^2 + 2969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×247795642² = 122805360388384328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247795592 and 247795601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415467 + ... + 416062.

Almost surely, 2^247795642 is an apocalyptic number.

247795642 is a deficient number, since it is larger than the sum of its proper divisors (126392858).

247795642 is a wasteful number, since it uses less digits than its factorization.

247795642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831680.

The product of its digits is 846720, while the sum is 46.

The square root of 247795642 is about 15741.5260378402. The cubic root of 247795642 is about 628.1035114783.

The spelling of 247795642 in words is "two hundred forty-seven million, seven hundred ninety-five thousand, six hundred forty-two".