247464121 has 4 divisors (see below), whose sum is σ = 262020852. Its totient is φ = 232907392.

The previous prime is 247464089. The next prime is 247464127. The reversal of 247464121 is 121464742.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163558521 + 83905600 = 12789^2 + 9160^2 .

It is a cyclic number.

It is not a de Polignac number, because 247464121 - 2⁵ = 247464089 is a prime.

It is a super-2 number, since 2×247464121² = 122476982364605282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247464127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7278340 + ... + 7278373.

It is an arithmetic number, because the mean of its divisors is an integer number (65505213).

Almost surely, 2^247464121 is an apocalyptic number.

It is an amenable number.

247464121 is a deficient number, since it is larger than the sum of its proper divisors (14556731).

247464121 is a wasteful number, since it uses less digits than its factorization.

247464121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14556730.

The product of its digits is 10752, while the sum is 31.

The square root of 247464121 is about 15730.9923717482. The cubic root of 247464121 is about 627.8232772851.

The spelling of 247464121 in words is "two hundred forty-seven million, four hundred sixty-four thousand, one hundred twenty-one".