1356987 has 4 divisors (see below), whose sum is σ = 1809320. Its totient is φ = 904656.

The previous prime is 1356973. The next prime is 1357001. The reversal of 1356987 is 7896531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7896531 = 3 ⋅2632177.

It is an interprime number because it is at equal distance from previous prime (1356973) and next prime (1357001).

It is not a de Polignac number, because 1356987 - 2¹¹ = 1354939 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226162 + ... + 226167.

It is an arithmetic number, because the mean of its divisors is an integer number (452330).

2^1356987 is an apocalyptic number.

1356987 is a deficient number, since it is larger than the sum of its proper divisors (452333).

1356987 is an equidigital number, since it uses as much as digits as its factorization.

1356987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452332.

The product of its digits is 45360, while the sum is 39.

The square root of 1356987 is about 1164.8978495988. The cubic root of 1356987 is about 110.7112860592.

The spelling of 1356987 in words is "one million, three hundred fifty-six thousand, nine hundred eighty-seven".