1290281 has 4 divisors (see below), whose sum is σ = 1302912. Its totient is φ = 1277652.

The previous prime is 1290259. The next prime is 1290287. The reversal of 1290281 is 1820921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1290281 is a prime.

It is a super-2 number, since 2×1290281² = 3329650117922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1290287) 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, 6161 + ... + 6366.

It is an arithmetic number, because the mean of its divisors is an integer number (325728).

2^1290281 is an apocalyptic number.

It is an amenable number.

1290281 is a deficient number, since it is larger than the sum of its proper divisors (12631).

1290281 is a wasteful number, since it uses less digits than its factorization.

1290281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12630.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1290281 is about 1135.9053657766. The cubic root of 1290281 is about 108.8666269837.

The spelling of 1290281 in words is "one million, two hundred ninety thousand, two hundred eighty-one".