1590242 has 4 divisors (see below), whose sum is σ = 2385366. Its totient is φ = 795120.

The previous prime is 1590241. The next prime is 1590247. The reversal of 1590242 is 2420951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2420951 = 13 ⋅186227.

It can be written as a sum of positive squares in only one way, i.e., 1590121 + 121 = 1261^2 + 11^2 .

It is not an unprimeable number, because it can be changed into a prime (1590241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397559 + ... + 397562.

2^1590242 is an apocalyptic number.

1590242 is a deficient number, since it is larger than the sum of its proper divisors (795124).

1590242 is an equidigital number, since it uses as much as digits as its factorization.

1590242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795123.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1590242 is about 1261.0479768827. The cubic root of 1590242 is about 116.7224531389.

The spelling of 1590242 in words is "one million, five hundred ninety thousand, two hundred forty-two".