12421370 has 16 divisors (see below), whose sum is σ = 24078600. Its totient is φ = 4586304.

The previous prime is 12421361. The next prime is 12421391. The reversal of 12421370 is 7312421.

It can be written as a sum of positive squares in 4 ways, for example, as 8231161 + 4190209 = 2869^2 + 2047^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47645 + ... + 47904.

Almost surely, 2^12421370 is an apocalyptic number.

12421370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12421370 is a deficient number, since it is larger than the sum of its proper divisors (11657230).

12421370 is a wasteful number, since it uses less digits than its factorization.

12421370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95569.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 12421370 is about 3524.3964022227. The cubic root of 12421370 is about 231.5917935729.

Adding to 12421370 its reverse (7312421), we get a palindrome (19733791).

The spelling of 12421370 in words is "twelve million, four hundred twenty-one thousand, three hundred seventy".