1275664 has 20 divisors (see below), whose sum is σ = 2662156. Its totient is φ = 588672.

The previous prime is 1275661. The next prime is 1275667. The reversal of 1275664 is 4665721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1275661) and next prime (1275667).

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 501264 = 880^2 + 708^2 .

It is not an unprimeable number, because it can be changed into a prime (1275661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2859 + ... + 3274.

2^1275664 is an apocalyptic number.

It is an amenable number.

1275664 is an abundant number, since it is smaller than the sum of its proper divisors (1386492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275664 is a wasteful number, since it uses less digits than its factorization.

1275664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6154 (or 6148 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 1275664 is about 1129.4529649348. The cubic root of 1275664 is about 108.4539647698.

The spelling of 1275664 in words is "one million, two hundred seventy-five thousand, six hundred sixty-four".