1240990 has 16 divisors (see below), whose sum is σ = 2248848. Its totient is φ = 493056.

The previous prime is 1240979. The next prime is 1240991. The reversal of 1240990 is 990421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240991) 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, 1609 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (140553).

2^1240990 is an apocalyptic number.

1240990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1240990 is a deficient number, since it is larger than the sum of its proper divisors (1007858).

1240990 is a wasteful number, since it uses less digits than its factorization.

1240990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1240990 is about 1113.9973069985. The cubic root of 1240990 is about 107.4622907218.

The spelling of 1240990 in words is "one million, two hundred forty thousand, nine hundred ninety".