1281407 has 2 divisors, whose sum is σ = 1281408. Its totient is φ = 1281406.

The previous prime is 1281389. The next prime is 1281431. The reversal of 1281407 is 7041821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281407 is a prime.

It is a Chen prime.

It is a congruent number.

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, 640703 + 640704.

It is an arithmetic number, because the mean of its divisors is an integer number (640704).

2^1281407 is an apocalyptic number.

1281407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281407 is an equidigital number, since it uses as much as digits as its factorization.

1281407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1281407 is about 1131.9924911412. The cubic root of 1281407 is about 108.6164732791.

The spelling of 1281407 in words is "one million, two hundred eighty-one thousand, four hundred seven".