260400247 has 2 divisors, whose sum is σ = 260400248. Its totient is φ = 260400246.

The previous prime is 260400233. The next prime is 260400253. The reversal of 260400247 is 742004062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260400247 - 2¹¹ = 260398199 is a prime.

It is a super-2 number, since 2×260400247² = 135616577275322018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260400047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130200123 + 130200124.

It is an arithmetic number, because the mean of its divisors is an integer number (130200124).

Almost surely, 2^260400247 is an apocalyptic number.

260400247 is a deficient number, since it is larger than the sum of its proper divisors (1).

260400247 is an equidigital number, since it uses as much as digits as its factorization.

260400247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 260400247 is about 16136.9218564136. The cubic root of 260400247 is about 638.5777719974.

The spelling of 260400247 in words is "two hundred sixty million, four hundred thousand, two hundred forty-seven".