1587878 has 4 divisors (see below), whose sum is σ = 2381820. Its totient is φ = 793938.

The previous prime is 1587877. The next prime is 1587899. The reversal of 1587878 is 8787851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8787851 = 227 ⋅38713.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 396968 + ... + 396971.

It is an arithmetic number, because the mean of its divisors is an integer number (595455).

2^1587878 is an apocalyptic number.

1587878 is a deficient number, since it is larger than the sum of its proper divisors (793942).

1587878 is an equidigital number, since it uses as much as digits as its factorization.

1587878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793941.

The product of its digits is 125440, while the sum is 44.

The square root of 1587878 is about 1260.1103126314. The cubic root of 1587878 is about 116.6645859039.

The spelling of 1587878 in words is "one million, five hundred eighty-seven thousand, eight hundred seventy-eight".