1281497 has 6 divisors (see below), whose sum is σ = 1490778. Its totient is φ = 1098384.

The previous prime is 1281463. The next prime is 1281503. The reversal of 1281497 is 7941821.

It can be written as a sum of positive squares in only one way, i.e., 866761 + 414736 = 931^2 + 644^2 .

It is not a de Polignac number, because 1281497 - 2⁶ = 1281433 is a prime.

It is a super-2 number, since 2×1281497² = 3284469122018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13028 + ... + 13125.

It is an arithmetic number, because the mean of its divisors is an integer number (248463).

2^1281497 is an apocalyptic number.

It is an amenable number.

1281497 is a deficient number, since it is larger than the sum of its proper divisors (209281).

1281497 is an equidigital number, since it uses as much as digits as its factorization.

1281497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26167 (or 26160 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 1281497 is about 1132.0322433571. The cubic root of 1281497 is about 108.6190161229.

The spelling of 1281497 in words is "one million, two hundred eighty-one thousand, four hundred ninety-seven".