1214321345 has 4 divisors (see below), whose sum is σ = 1457185620. Its totient is φ = 971457072.

The previous prime is 1214321341. The next prime is 1214321357. The reversal of 1214321345 is 5431234121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 572357776 + 641963569 = 23924^2 + 25337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214321345 - 2² = 1214321341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1214321341) 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, 121432130 + ... + 121432139.

It is an arithmetic number, because the mean of its divisors is an integer number (364296405).

Almost surely, 2^1214321345 is an apocalyptic number.

It is an amenable number.

1214321345 is a deficient number, since it is larger than the sum of its proper divisors (242864275).

1214321345 is an equidigital number, since it uses as much as digits as its factorization.

1214321345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242864274.

The product of its digits is 2880, while the sum is 26.

The square root of 1214321345 is about 34847.1138690136. The cubic root of 1214321345 is about 1066.8692791656.

Adding to 1214321345 its reverse (5431234121), we get a palindrome (6645555466).

The spelling of 1214321345 in words is "one billion, two hundred fourteen million, three hundred twenty-one thousand, three hundred forty-five".