1270649 has 2 divisors, whose sum is σ = 1270650. Its totient is φ = 1270648.

The previous prime is 1270639. The next prime is 1270651. The reversal of 1270649 is 9460721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 310249 = 980^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270649 - 2²⁰ = 222073 is a prime.

It is a super-2 number, since 2×1270649² = 3229097762402, which contains 22 as substring.

Together with 1270651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1270609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635324 + 635325.

It is an arithmetic number, because the mean of its divisors is an integer number (635325).

2^1270649 is an apocalyptic number.

It is an amenable number.

1270649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270649 is an equidigital number, since it uses as much as digits as its factorization.

1270649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1270649 is about 1127.2306773682. The cubic root of 1270649 is about 108.3116569385.

The spelling of 1270649 in words is "one million, two hundred seventy thousand, six hundred forty-nine".