740257281 has 12 divisors (see below), whose sum is σ = 1070589520. Its totient is φ = 492891480.

The previous prime is 740257279. The next prime is 740257313. The reversal of 740257281 is 182752047.

740257281 is a `hidden beast` number, since 7 + 4 + 0 + 2 + 572 + 81 = 666.

It is not a de Polignac number, because 740257281 - 2¹ = 740257279 is a prime.

It is a super-2 number, since 2×740257281² = 1095961684147025922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (740257211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43411 + ... + 58008.

Almost surely, 2^740257281 is an apocalyptic number.

It is an amenable number.

740257281 is a deficient number, since it is larger than the sum of its proper divisors (330332239).

740257281 is a wasteful number, since it uses less digits than its factorization.

740257281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102236 (or 102233 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 740257281 is about 27207.6695253379. The cubic root of 740257281 is about 904.6089826118.

The spelling of 740257281 in words is "seven hundred forty million, two hundred fifty-seven thousand, two hundred eighty-one".