12491770 has 32 divisors (see below), whose sum is σ = 23992848. Its totient is φ = 4666368.

The previous prime is 12491761. The next prime is 12491771. The reversal of 12491770 is 7719421.

It can be written as a sum of positive squares in 8 ways, for example, as 10896601 + 1595169 = 3301^2 + 1263^2 .

It is not an unprimeable number, because it can be changed into a prime (12491771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33304 + ... + 33676.

Almost surely, 2^12491770 is an apocalyptic number.

12491770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12491770 is a deficient number, since it is larger than the sum of its proper divisors (11501078).

12491770 is a wasteful number, since it uses less digits than its factorization.

12491770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 12491770 is about 3534.3698165302. The cubic root of 12491770 is about 232.0284967968.

The spelling of 12491770 in words is "twelve million, four hundred ninety-one thousand, seven hundred seventy".