1390587 has 8 divisors (see below), whose sum is σ = 2022720. Its totient is φ = 842760.

The previous prime is 1390573. The next prime is 1390601. The reversal of 1390587 is 7850931.

It is an interprime number because it is at equal distance from previous prime (1390573) and next prime (1390601).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1390587 - 2⁸ = 1390331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 42139 = 1390587 / (1 + 3 + 9 + 0 + 5 + 8 + 7).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1390507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21037 + ... + 21102.

It is an arithmetic number, because the mean of its divisors is an integer number (252840).

2^1390587 is an apocalyptic number.

1390587 is a deficient number, since it is larger than the sum of its proper divisors (632133).

1390587 is a wasteful number, since it uses less digits than its factorization.

1390587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42153.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1390587 is about 1179.2315294292. The cubic root of 1390587 is about 111.6176106893.

The spelling of 1390587 in words is "one million, three hundred ninety thousand, five hundred eighty-seven".