1587442 has 4 divisors (see below), whose sum is σ = 2381166. Its totient is φ = 793720.

The previous prime is 1587413. The next prime is 1587449. The reversal of 1587442 is 2447851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1038361 + 549081 = 1019^2 + 741^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1587449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 396859 + ... + 396862.

2^1587442 is an apocalyptic number.

1587442 is a deficient number, since it is larger than the sum of its proper divisors (793724).

1587442 is an equidigital number, since it uses as much as digits as its factorization.

1587442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793723.

The product of its digits is 8960, while the sum is 31.

The square root of 1587442 is about 1259.9373000273. The cubic root of 1587442 is about 116.6539069946.

The spelling of 1587442 in words is "one million, five hundred eighty-seven thousand, four hundred forty-two".