12400785 has 12 divisors (see below), whose sum is σ = 21494772. Its totient is φ = 6613728.

The previous prime is 12400757. The next prime is 12400793. The reversal of 12400785 is 58700421.

12400785 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4915089 + 7485696 = 2217^2 + 2736^2 .

It is not a de Polignac number, because 12400785 - 2⁵ = 12400753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137742 + ... + 137831.

It is an arithmetic number, because the mean of its divisors is an integer number (1791231).

Almost surely, 2^12400785 is an apocalyptic number.

12400785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12400785 is a deficient number, since it is larger than the sum of its proper divisors (9093987).

12400785 is a wasteful number, since it uses less digits than its factorization.

12400785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275584 (or 275581 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 12400785 is about 3521.4748330778. The cubic root of 12400785 is about 231.4637896302.

The spelling of 12400785 in words is "twelve million, four hundred thousand, seven hundred eighty-five".