1240642885 has 8 divisors (see below), whose sum is σ = 1553500800. Its totient is φ = 949361424.

The previous prime is 1240642873. The next prime is 1240642889. The reversal of 1240642885 is 5882460421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240642885 - 2¹¹ = 1240640837 is a prime.

It is a super-2 number, since 2×1240642885² = 3078389536202246450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240642889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5393985 + ... + 5394214.

It is an arithmetic number, because the mean of its divisors is an integer number (194187600).

Almost surely, 2^1240642885 is an apocalyptic number.

It is an amenable number.

1240642885 is a deficient number, since it is larger than the sum of its proper divisors (312857915).

1240642885 is a wasteful number, since it uses less digits than its factorization.

1240642885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10788227.

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 1240642885 is about 35222.7608940583. The cubic root of 1240642885 is about 1074.5227042849.

The spelling of 1240642885 in words is "one billion, two hundred forty million, six hundred forty-two thousand, eight hundred eighty-five".