1355987 has 2 divisors, whose sum is σ = 1355988. Its totient is φ = 1355986.

The previous prime is 1355983. The next prime is 1355989. The reversal of 1355987 is 7895531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1355987 - 2² = 1355983 is a prime.

Together with 1355989, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1355987.

It is not a weakly prime, because it can be changed into another prime (1355983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677993 + 677994.

It is an arithmetic number, because the mean of its divisors is an integer number (677994).

2^1355987 is an apocalyptic number.

1355987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355987 is an equidigital number, since it uses as much as digits as its factorization.

1355987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 38.

The square root of 1355987 is about 1164.4685483086. The cubic root of 1355987 is about 110.6840840072.

The spelling of 1355987 in words is "one million, three hundred fifty-five thousand, nine hundred eighty-seven".