1220134402 has 8 divisors (see below), whose sum is σ = 1831236876. Its totient is φ = 609722112.

The previous prime is 1220134397. The next prime is 1220134403. The reversal of 1220134402 is 2044310221.

It can be written as a sum of positive squares in 2 ways, for example, as 1182053161 + 38081241 = 34381^2 + 6171^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1220134402.

It is not an unprimeable number, because it can be changed into a prime (1220134403) 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, 168103 + ... + 175210.

Almost surely, 2^1220134402 is an apocalyptic number.

1220134402 is a deficient number, since it is larger than the sum of its proper divisors (611102474).

1220134402 is a wasteful number, since it uses less digits than its factorization.

1220134402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345092.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220134402 is about 34930.4222991936. The cubic root of 1220134402 is about 1068.5689671050.

Adding to 1220134402 its reverse (2044310221), we get a palindrome (3264444623).

The spelling of 1220134402 in words is "one billion, two hundred twenty million, one hundred thirty-four thousand, four hundred two".