1260649 has 4 divisors (see below), whose sum is σ = 1357636. Its totient is φ = 1163664.

The previous prime is 1260643. The next prime is 1260661. The reversal of 1260649 is 9460621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 1166400 = 307^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260649 - 2³ = 1260641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48474 + ... + 48499.

It is an arithmetic number, because the mean of its divisors is an integer number (339409).

2^1260649 is an apocalyptic number.

It is an amenable number.

1260649 is a deficient number, since it is larger than the sum of its proper divisors (96987).

1260649 is an equidigital number, since it uses as much as digits as its factorization.

1260649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96986.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1260649 is about 1122.7862663927. The cubic root of 1260649 is about 108.0267709127.

Subtracting from 1260649 its sum of digits (28), we obtain a palindrome (1260621).

The spelling of 1260649 in words is "one million, two hundred sixty thousand, six hundred forty-nine".