1587242 has 4 divisors (see below), whose sum is σ = 2380866. Its totient is φ = 793620.

The previous prime is 1587221. The next prime is 1587251. The reversal of 1587242 is 2427851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2427851 = 29 ⋅83719.

It can be written as a sum of positive squares in only one way, i.e., 863041 + 724201 = 929^2 + 851^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 396809 + ... + 396812.

2^1587242 is an apocalyptic number.

1587242 is a deficient number, since it is larger than the sum of its proper divisors (793624).

1587242 is an equidigital number, since it uses as much as digits as its factorization.

1587242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793623.

The product of its digits is 4480, while the sum is 29.

The square root of 1587242 is about 1259.8579284983. The cubic root of 1587242 is about 116.6490077581.

The spelling of 1587242 in words is "one million, five hundred eighty-seven thousand, two hundred forty-two".