1212340419 has 64 divisors (see below), whose sum is σ = 1943654400. Its totient is φ = 744961536.

The previous prime is 1212340369. The next prime is 1212340421. The reversal of 1212340419 is 9140432121.

It is a happy number.

1212340419 is a `hidden beast` number, since 1 + 212 + 34 + 0 + 419 = 666.

It is not a de Polignac number, because 1212340419 - 2¹⁵ = 1212307651 is a prime.

It is a super-2 number, since 2×1212340419² = 2939538583082191122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1212340392 and 1212340401.

It is not an unprimeable number, because it can be changed into a prime (1212340819) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2130367 + ... + 2130935.

It is an arithmetic number, because the mean of its divisors is an integer number (30369600).

Almost surely, 2^1212340419 is an apocalyptic number.

1212340419 is a deficient number, since it is larger than the sum of its proper divisors (731313981).

1212340419 is a wasteful number, since it uses less digits than its factorization.

1212340419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1212340419 is about 34818.6791679409. The cubic root of 1212340419 is about 1066.2888344209.

The spelling of 1212340419 in words is "one billion, two hundred twelve million, three hundred forty thousand, four hundred nineteen".