1245812 has 6 divisors (see below), whose sum is σ = 2180178. Its totient is φ = 622904.

The previous prime is 1245799. The next prime is 1245817. The reversal of 1245812 is 2185421.

It can be written as a sum of positive squares in only one way, i.e., 1175056 + 70756 = 1084^2 + 266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155723 + ... + 155730.

It is an arithmetic number, because the mean of its divisors is an integer number (363363).

2^1245812 is an apocalyptic number.

It is an amenable number.

1245812 is a deficient number, since it is larger than the sum of its proper divisors (934366).

1245812 is a wasteful number, since it uses less digits than its factorization.

1245812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311457 (or 311455 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 1245812 is about 1116.1594868118. The cubic root of 1245812 is about 107.6012962628.

The spelling of 1245812 in words is "one million, two hundred forty-five thousand, eight hundred twelve".