1245136 has 20 divisors (see below), whose sum is σ = 2455200. Its totient is φ = 611552.

The previous prime is 1245121. The next prime is 1245137. The reversal of 1245136 is 6315421.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (122760).

2^1245136 is an apocalyptic number.

1245136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1245136 is a deficient number, since it is larger than the sum of its proper divisors (1210064).

1245136 is a wasteful number, since it uses less digits than its factorization.

1245136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386 (or 1380 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 1245136 is about 1115.8566216141. The cubic root of 1245136 is about 107.5818306086.

The spelling of 1245136 in words is "one million, two hundred forty-five thousand, one hundred thirty-six".