1281451 has 2 divisors, whose sum is σ = 1281452. Its totient is φ = 1281450.

The previous prime is 1281439. The next prime is 1281457. The reversal of 1281451 is 1541821.

It is a strong prime.

It is an emirp because it is prime and its reverse (1541821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1281457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640725 + 640726.

It is an arithmetic number, because the mean of its divisors is an integer number (640726).

2^1281451 is an apocalyptic number.

1281451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281451 is an equidigital number, since it uses as much as digits as its factorization.

1281451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 22.

The square root of 1281451 is about 1132.0119257322. The cubic root of 1281451 is about 108.6177164621.

The spelling of 1281451 in words is "one million, two hundred eighty-one thousand, four hundred fifty-one".