1240472887 has 4 divisors (see below), whose sum is σ = 1240851976. Its totient is φ = 1240093800.

The previous prime is 1240472851. The next prime is 1240472899. The reversal of 1240472887 is 7882740421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240472887 is a prime.

It is a super-2 number, since 2×1240472887² = 3077545966764229538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240472287) 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, 184593 + ... + 191194.

It is an arithmetic number, because the mean of its divisors is an integer number (310212994).

Almost surely, 2^1240472887 is an apocalyptic number.

1240472887 is a deficient number, since it is larger than the sum of its proper divisors (379089).

1240472887 is an equidigital number, since it uses as much as digits as its factorization.

1240472887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379088.

The product of its (nonzero) digits is 200704, while the sum is 43.

The square root of 1240472887 is about 35220.3476274724. The cubic root of 1240472887 is about 1074.4736235336.

The spelling of 1240472887 in words is "one billion, two hundred forty million, four hundred seventy-two thousand, eight hundred eighty-seven".