1381275087 has 4 divisors (see below), whose sum is σ = 1841700120. Its totient is φ = 920850056.

The previous prime is 1381275073. The next prime is 1381275113. The reversal of 1381275087 is 7805721831.

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

It is a cyclic number.

It is not a de Polignac number, because 1381275087 - 2⁶ = 1381275023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381275037) 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, 230212512 + ... + 230212517.

It is an arithmetic number, because the mean of its divisors is an integer number (460425030).

Almost surely, 2^1381275087 is an apocalyptic number.

1381275087 is a deficient number, since it is larger than the sum of its proper divisors (460425033).

1381275087 is an equidigital number, since it uses as much as digits as its factorization.

1381275087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460425032.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 1381275087 is about 37165.5093736114. The cubic root of 1381275087 is about 1113.6790746654.

The spelling of 1381275087 in words is "one billion, three hundred eighty-one million, two hundred seventy-five thousand, eighty-seven".