1212405043 has 4 divisors (see below), whose sum is σ = 1214936640. Its totient is φ = 1209873448.

The previous prime is 1212405013. The next prime is 1212405079. The reversal of 1212405043 is 3405042121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212405043 - 2¹³ = 1212396851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212405013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265080 + ... + 1266037.

It is an arithmetic number, because the mean of its divisors is an integer number (303734160).

Almost surely, 2^1212405043 is an apocalyptic number.

1212405043 is a deficient number, since it is larger than the sum of its proper divisors (2531597).

1212405043 is an equidigital number, since it uses as much as digits as its factorization.

1212405043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531596.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1212405043 is about 34819.6071632062. The cubic root of 1212405043 is about 1066.3077803166.

Adding to 1212405043 its reverse (3405042121), we get a palindrome (4617447164).

The spelling of 1212405043 in words is "one billion, two hundred twelve million, four hundred five thousand, forty-three".