1370987 has 2 divisors, whose sum is σ = 1370988. Its totient is φ = 1370986.

The previous prime is 1370981. The next prime is 1371001. The reversal of 1370987 is 7890731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1370987 - 2¹⁴ = 1354603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1370981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685493 + 685494.

It is an arithmetic number, because the mean of its divisors is an integer number (685494).

2^1370987 is an apocalyptic number.

1370987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1370987 is an equidigital number, since it uses as much as digits as its factorization.

1370987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 1370987 is about 1170.8915406646. The cubic root of 1370987 is about 111.0907193319.

It can be divided in two parts, 1370 and 987, that multiplied together give a triangular number (1352190 = T₁₆₄₄).

The spelling of 1370987 in words is "one million, three hundred seventy thousand, nine hundred eighty-seven".