1270657 has 2 divisors, whose sum is σ = 1270658. Its totient is φ = 1270656.

The previous prime is 1270651. The next prime is 1270667. The reversal of 1270657 is 7560721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1252161 + 18496 = 1119^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270657 - 2³ = 1270649 is a prime.

It is a super-2 number, since 2×1270657² = 3229138423298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1270651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635328 + 635329.

It is an arithmetic number, because the mean of its divisors is an integer number (635329).

2^1270657 is an apocalyptic number.

It is an amenable number.

1270657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270657 is an equidigital number, since it uses as much as digits as its factorization.

1270657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 1270657 is about 1127.2342258821. The cubic root of 1270657 is about 108.3118842480.

Subtracting 1270657 from its reverse (7560721), we obtain a square (6290064 = 2508²).

The spelling of 1270657 in words is "one million, two hundred seventy thousand, six hundred fifty-seven".