1213225405 has 8 divisors (see below), whose sum is σ = 1663852032. Its totient is φ = 831925968.

The previous prime is 1213225379. The next prime is 1213225427. The reversal of 1213225405 is 5045223121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213225405 - 2¹⁵ = 1213192637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213225405.

It is a congruent number.

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, 17331757 + ... + 17331826.

It is an arithmetic number, because the mean of its divisors is an integer number (207981504).

Almost surely, 2^1213225405 is an apocalyptic number.

It is an amenable number.

1213225405 is a deficient number, since it is larger than the sum of its proper divisors (450626627).

1213225405 is an equidigital number, since it uses as much as digits as its factorization.

1213225405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34663595.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1213225405 is about 34831.3853442553. The cubic root of 1213225405 is about 1066.5482283318.

Adding to 1213225405 its reverse (5045223121), we get a palindrome (6258448526).

The spelling of 1213225405 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, four hundred five".