247294421 has 16 divisors (see below), whose sum is σ = 280221120. Its totient is φ = 216247680.

The previous prime is 247294391. The next prime is 247294423. The reversal of 247294421 is 124492742.

It is not a de Polignac number, because 247294421 - 2⁶ = 247294357 is a prime.

It is a super-2 number, since 2×247294421² = 122309061315450482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247294423) 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, 32810 + ... + 39636.

It is an arithmetic number, because the mean of its divisors is an integer number (17513820).

Almost surely, 2^247294421 is an apocalyptic number.

It is an amenable number.

247294421 is a deficient number, since it is larger than the sum of its proper divisors (32926699).

247294421 is a wasteful number, since it uses less digits than its factorization.

247294421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964.

The product of its digits is 32256, while the sum is 35.

The square root of 247294421 is about 15725.5976357021. The cubic root of 247294421 is about 627.6797332798.

The spelling of 247294421 in words is "two hundred forty-seven million, two hundred ninety-four thousand, four hundred twenty-one".