12155419 has 2 divisors, whose sum is σ = 12155420. Its totient is φ = 12155418.

The previous prime is 12155401. The next prime is 12155447. The reversal of 12155419 is 91455121.

It is an a-pointer prime, because the next prime (12155447) can be obtained adding 12155419 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12155419 - 2⁵ = 12155387 is a prime.

It is a super-2 number, since 2×12155419² = 295508422131122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12155519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077709 + 6077710.

It is an arithmetic number, because the mean of its divisors is an integer number (6077710).

Almost surely, 2^12155419 is an apocalyptic number.

12155419 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155419 is an equidigital number, since it uses as much as digits as its factorization.

12155419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 28.

The square root of 12155419 is about 3486.4622470350. The cubic root of 12155419 is about 229.9270026695.

The spelling of 12155419 in words is "twelve million, one hundred fifty-five thousand, four hundred nineteen".