1242990 has 48 divisors (see below), whose sum is σ = 3695328. Its totient is φ = 283968.

The previous prime is 1242979. The next prime is 1242991. The reversal of 1242990 is 992421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357 + ... + 1616.

It is an arithmetic number, because the mean of its divisors is an integer number (76986).

2^1242990 is an apocalyptic number.

1242990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242990 is an abundant number, since it is smaller than the sum of its proper divisors (2452338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242990 is a wasteful number, since it uses less digits than its factorization.

1242990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1242990 is about 1114.8946138537. The cubic root of 1242990 is about 107.5199890718.

The spelling of 1242990 in words is "one million, two hundred forty-two thousand, nine hundred ninety".