1319281 has 2 divisors, whose sum is σ = 1319282. Its totient is φ = 1319280.

The previous prime is 1319273. The next prime is 1319293. The reversal of 1319281 is 1829131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 152881 = 1080^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319281 - 2³ = 1319273 is a prime.

It is a super-2 number, since 2×1319281² = 3481004713922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1319261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659640 + 659641.

It is an arithmetic number, because the mean of its divisors is an integer number (659641).

2^1319281 is an apocalyptic number.

It is an amenable number.

1319281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319281 is an equidigital number, since it uses as much as digits as its factorization.

1319281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The square root of 1319281 is about 1148.5995820999. The cubic root of 1319281 is about 109.6762103812.

It can be divided in two parts, 1319 and 281, that added together give a square (1600 = 40²).

The spelling of 1319281 in words is "one million, three hundred nineteen thousand, two hundred eighty-one".