1240641 has 6 divisors (see below), whose sum is σ = 1792050. Its totient is φ = 827088.

The previous prime is 1240637. The next prime is 1240667. The reversal of 1240641 is 1460421.

1240641 is a `hidden beast` number, since 1 + 24 + 0 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 41616 = 1095^2 + 204^2 .

It is not a de Polignac number, because 1240641 - 2² = 1240637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68916 + ... + 68933.

It is an arithmetic number, because the mean of its divisors is an integer number (298675).

2^1240641 is an apocalyptic number.

It is an amenable number.

1240641 is a deficient number, since it is larger than the sum of its proper divisors (551409).

1240641 is a wasteful number, since it uses less digits than its factorization.

1240641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137855 (or 137852 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1240641 is about 1113.8406528763. The cubic root of 1240641 is about 107.4522160084.

It can be divided in two parts, 1240 and 641, that added together give a palindrome (1881).

The spelling of 1240641 in words is "one million, two hundred forty thousand, six hundred forty-one".