1290587 has 8 divisors (see below), whose sum is σ = 1347840. Its totient is φ = 1234240.

The previous prime is 1290581. The next prime is 1290593. The reversal of 1290587 is 7850921.

It is an interprime number because it is at equal distance from previous prime (1290581) and next prime (1290593).

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

It is not a de Polignac number, because 1290587 - 2⁴ = 1290571 is a prime.

It is a super-2 number, since 2×1290587² = 3331229609138, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1290581) 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, 5423 + ... + 5655.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

2^1290587 is an apocalyptic number.

1290587 is a deficient number, since it is larger than the sum of its proper divisors (57253).

1290587 is a wasteful number, since it uses less digits than its factorization.

1290587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1290587 is about 1136.0400521108. The cubic root of 1290587 is about 108.8752324876.

The spelling of 1290587 in words is "one million, two hundred ninety thousand, five hundred eighty-seven".