1240887 has 4 divisors (see below), whose sum is σ = 1654520. Its totient is φ = 827256.

The previous prime is 1240861. The next prime is 1240931. The reversal of 1240887 is 7880421.

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

It is not a de Polignac number, because 1240887 - 2¹² = 1236791 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240807) 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, 206812 + ... + 206817.

It is an arithmetic number, because the mean of its divisors is an integer number (413630).

2^1240887 is an apocalyptic number.

1240887 is a deficient number, since it is larger than the sum of its proper divisors (413633).

1240887 is an equidigital number, since it uses as much as digits as its factorization.

1240887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413632.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 1240887 is about 1113.9510761250. The cubic root of 1240887 is about 107.4593175788.

The spelling of 1240887 in words is "one million, two hundred forty thousand, eight hundred eighty-seven".