12019406 has 20 divisors (see below), whose sum is σ = 21041112. Its totient is φ = 5149116.

The previous prime is 12019387. The next prime is 12019411. The reversal of 12019406 is 60491021.

It is a happy number.

It is a super-2 number, since 2×12019406² = 288932241185672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3551 + ... + 6053.

Almost surely, 2^12019406 is an apocalyptic number.

12019406 is a deficient number, since it is larger than the sum of its proper divisors (9021706).

12019406 is an frugal number, since it uses more digits than its factorization.

12019406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533 (or 2512 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 12019406 is about 3466.9014984565. The cubic root of 12019406 is about 229.0661949583.

The spelling of 12019406 in words is "twelve million, nineteen thousand, four hundred six".