1240666 has 16 divisors (see below), whose sum is σ = 2219904. Its totient is φ = 508464.

The previous prime is 1240637. The next prime is 1240667. The reversal of 1240666 is 6660421.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240666.

It is not an unprimeable number, because it can be changed into a prime (1240667) 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, 1605 + ... + 2248.

It is an arithmetic number, because the mean of its divisors is an integer number (138744).

2^1240666 is an apocalyptic number.

1240666 is a deficient number, since it is larger than the sum of its proper divisors (979238).

1240666 is a wasteful number, since it uses less digits than its factorization.

1240666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1240666 is about 1113.8518752509. The cubic root of 1240666 is about 107.4529377556.

The spelling of 1240666 in words is "one million, two hundred forty thousand, six hundred sixty-six".