247274421 has 16 divisors (see below), whose sum is σ = 337210368. Its totient is φ = 161132400.

The previous prime is 247274413. The next prime is 247274453. The reversal of 247274421 is 124472742.

It is not a de Polignac number, because 247274421 - 2³ = 247274413 is a prime.

It is a super-2 number, since 2×247274421² = 122289278561770482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247274491) 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, 21636 + ... + 31026.

It is an arithmetic number, because the mean of its divisors is an integer number (21075648).

Almost surely, 2^247274421 is an apocalyptic number.

It is an amenable number.

247274421 is a deficient number, since it is larger than the sum of its proper divisors (89935947).

247274421 is a wasteful number, since it uses less digits than its factorization.

247274421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9592.

The product of its digits is 25088, while the sum is 33.

The square root of 247274421 is about 15724.9617169645. The cubic root of 247274421 is about 627.6628115703.

The spelling of 247274421 in words is "two hundred forty-seven million, two hundred seventy-four thousand, four hundred twenty-one".