1285264 has 10 divisors (see below), whose sum is σ = 2490230. Its totient is φ = 642624.

The previous prime is 1285259. The next prime is 1285267. The reversal of 1285264 is 4625821.

1285264 = T₂₀₇ + T₂₀₈ + ... + T₂₅₄.

It can be written as a sum of positive squares in only one way, i.e., 1227664 + 57600 = 1108^2 + 240^2 .

It is not an unprimeable number, because it can be changed into a prime (1285267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40149 + ... + 40180.

It is an arithmetic number, because the mean of its divisors is an integer number (249023).

2^1285264 is an apocalyptic number.

It is an amenable number.

1285264 is a deficient number, since it is larger than the sum of its proper divisors (1204966).

1285264 is an equidigital number, since it uses as much as digits as its factorization.

1285264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80337 (or 80331 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 1285264 is about 1133.6948443034. The cubic root of 1285264 is about 108.7253416591.

Subtracting from 1285264 its product of digits (3840), we obtain a square (1281424 = 1132²).

The spelling of 1285264 in words is "one million, two hundred eighty-five thousand, two hundred sixty-four".