1240510081 has 4 divisors (see below), whose sum is σ = 1246744000. Its totient is φ = 1234276164.

The previous prime is 1240510067. The next prime is 1240510093. The reversal of 1240510081 is 1800150421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1240510081 - 2⁷ = 1240509953 is a prime.

It is a super-2 number, since 2×1240510081² = 3077730522125253122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240510001) 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, 3116661 + ... + 3117058.

It is an arithmetic number, because the mean of its divisors is an integer number (311686000).

Almost surely, 2^1240510081 is an apocalyptic number.

It is an amenable number.

1240510081 is a deficient number, since it is larger than the sum of its proper divisors (6233919).

1240510081 is an equidigital number, since it uses as much as digits as its factorization.

1240510081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6233918.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 1240510081 is about 35220.8756421529. The cubic root of 1240510081 is about 1074.4843623341.

The spelling of 1240510081 in words is "one billion, two hundred forty million, five hundred ten thousand, eighty-one".