1280537 has 2 divisors, whose sum is σ = 1280538. Its totient is φ = 1280536.

The previous prime is 1280519. The next prime is 1280549. The reversal of 1280537 is 7350821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263376 + 17161 = 1124^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280537 - 2⁶ = 1280473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1280567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640268 + 640269.

It is an arithmetic number, because the mean of its divisors is an integer number (640269).

2^1280537 is an apocalyptic number.

It is an amenable number.

1280537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280537 is an equidigital number, since it uses as much as digits as its factorization.

1280537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1280537 is about 1131.6081477261. The cubic root of 1280537 is about 108.5918863145.

The spelling of 1280537 in words is "one million, two hundred eighty thousand, five hundred thirty-seven".