1380787 has 4 divisors (see below), whose sum is σ = 1453480. Its totient is φ = 1308096.

The previous prime is 1380781. The next prime is 1380793. The reversal of 1380787 is 7870831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7870831 = 439 ⋅17929.

It is an interprime number because it is at equal distance from previous prime (1380781) and next prime (1380793).

It is a cyclic number.

It is not a de Polignac number, because 1380787 - 2³ = 1380779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380781) 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, 36318 + ... + 36355.

It is an arithmetic number, because the mean of its divisors is an integer number (363370).

2^1380787 is an apocalyptic number.

1380787 is a deficient number, since it is larger than the sum of its proper divisors (72693).

1380787 is an equidigital number, since it uses as much as digits as its factorization.

1380787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72692.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1380787 is about 1175.0689341481. The cubic root of 1380787 is about 111.3547882764.

The spelling of 1380787 in words is "one million, three hundred eighty thousand, seven hundred eighty-seven".