1213142451 has 8 divisors (see below), whose sum is σ = 1618637760. Its totient is φ = 808204392.

The previous prime is 1213142443. The next prime is 1213142453. The reversal of 1213142451 is 1542413121.

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

It is not a de Polignac number, because 1213142451 - 2³ = 1213142443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213142453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134205 + ... + 142958.

It is an arithmetic number, because the mean of its divisors is an integer number (202329720).

Almost surely, 2^1213142451 is an apocalyptic number.

1213142451 is a deficient number, since it is larger than the sum of its proper divisors (405495309).

1213142451 is a wasteful number, since it uses less digits than its factorization.

1213142451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278625.

The product of its digits is 960, while the sum is 24.

The square root of 1213142451 is about 34830.1945300339. The cubic root of 1213142451 is about 1066.5239194501.

Adding to 1213142451 its reverse (1542413121), we get a palindrome (2755555572).

The spelling of 1213142451 in words is "one billion, two hundred thirteen million, one hundred forty-two thousand, four hundred fifty-one".