1240869 has 16 divisors (see below), whose sum is σ = 1943168. Its totient is φ = 689472.

The previous prime is 1240861. The next prime is 1240931. The reversal of 1240869 is 9680421.

It is not a de Polignac number, because 1240869 - 2³ = 1240861 is a prime.

It is a super-2 number, since 2×1240869² = 3079511750322, 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 (1240861) 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, 22 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (121448).

2^1240869 is an apocalyptic number.

It is an amenable number.

1240869 is a deficient number, since it is larger than the sum of its proper divisors (702299).

1240869 is a wasteful number, since it uses less digits than its factorization.

1240869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1240869 is about 1113.9429967462. The cubic root of 1240869 is about 107.4587979835.

The spelling of 1240869 in words is "one million, two hundred forty thousand, eight hundred sixty-nine".