12451730 has 16 divisors (see below), whose sum is σ = 23186520. Its totient is φ = 4808832.

The previous prime is 12451727. The next prime is 12451787. The reversal of 12451730 is 3715421.

It can be written as a sum of positive squares in 4 ways, for example, as 5707321 + 6744409 = 2389^2 + 2597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12451696 and 12451705.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21179 + ... + 21758.

Almost surely, 2^12451730 is an apocalyptic number.

12451730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12451730 is a deficient number, since it is larger than the sum of its proper divisors (10734790).

12451730 is a wasteful number, since it uses less digits than its factorization.

12451730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42973.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12451730 is about 3528.7008940969. The cubic root of 12451730 is about 231.7803236676.

It can be divided in two parts, 1245 and 1730, that multiplied together give a triangular number (2153850 = T₂₀₇₅).

The spelling of 12451730 in words is "twelve million, four hundred fifty-one thousand, seven hundred thirty".