1361987 has 4 divisors (see below), whose sum is σ = 1485816. Its totient is φ = 1238160.

The previous prime is 1361963. The next prime is 1361999. The reversal of 1361987 is 7891631.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1361987 - 2¹⁸ = 1099843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361957) 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, 61898 + ... + 61919.

It is an arithmetic number, because the mean of its divisors is an integer number (371454).

2^1361987 is an apocalyptic number.

1361987 is a deficient number, since it is larger than the sum of its proper divisors (123829).

1361987 is a wasteful number, since it uses less digits than its factorization.

1361987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123828.

The product of its digits is 9072, while the sum is 35.

The square root of 1361987 is about 1167.0419872481. The cubic root of 1361987 is about 110.8470962363.

The spelling of 1361987 in words is "one million, three hundred sixty-one thousand, nine hundred eighty-seven".