1240485281 has 16 divisors (see below), whose sum is σ = 1493923200. Its totient is φ = 1006224768.

The previous prime is 1240485271. The next prime is 1240485283. The reversal of 1240485281 is 1825840421.

It is a cyclic number.

It is not a de Polignac number, because 1240485281 - 2¹⁰ = 1240484257 is a prime.

It is a super-2 number, since 2×1240485281² = 3077607464755297922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1240485283) 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, 132875 + ... + 141903.

It is an arithmetic number, because the mean of its divisors is an integer number (93370200).

Almost surely, 2^1240485281 is an apocalyptic number.

It is an amenable number.

1240485281 is a deficient number, since it is larger than the sum of its proper divisors (253437919).

1240485281 is a wasteful number, since it uses less digits than its factorization.

1240485281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10088.

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 1240485281 is about 35220.5235764604. The cubic root of 1240485281 is about 1074.4772020027.

The spelling of 1240485281 in words is "one billion, two hundred forty million, four hundred eighty-five thousand, two hundred eighty-one".