1227649 has 2 divisors, whose sum is σ = 1227650. Its totient is φ = 1227648.

The previous prime is 1227637. The next prime is 1227659. The reversal of 1227649 is 9467221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1140624 + 87025 = 1068^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227649 - 2¹³ = 1219457 is a prime.

It is a Chen prime.

It is equal to p₉₄₈₈₂ and since 1227649 and 94882 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1227649.

It is not a weakly prime, because it can be changed into another prime (1227619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613824 + 613825.

It is an arithmetic number, because the mean of its divisors is an integer number (613825).

2^1227649 is an apocalyptic number.

It is an amenable number.

1227649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227649 is an equidigital number, since it uses as much as digits as its factorization.

1227649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 1227649 is about 1107.9932310263. The cubic root of 1227649 is about 107.0758189737.

The spelling of 1227649 in words is "one million, two hundred twenty-seven thousand, six hundred forty-nine".