1281715 has 12 divisors (see below), whose sum is σ = 1635696. Its totient is φ = 963968.

The previous prime is 1281703. The next prime is 1281727. The reversal of 1281715 is 5171821.

It is an interprime number because it is at equal distance from previous prime (1281703) and next prime (1281727).

It is not a de Polignac number, because 1281715 - 2⁷ = 1281587 is a prime.

It is a Duffinian number.

1281715 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281715.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (136308).

2^1281715 is an apocalyptic number.

1281715 is a deficient number, since it is larger than the sum of its proper divisors (353981).

1281715 is an equidigital number, since it uses as much as digits as its factorization.

1281715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 909 counting only the distinct ones).

The product of its digits is 560, while the sum is 25.

The square root of 1281715 is about 1132.1285262725. The cubic root of 1281715 is about 108.6251749624.

The spelling of 1281715 in words is "one million, two hundred eighty-one thousand, seven hundred fifteen".