1223140402 has 32 divisors (see below), whose sum is σ = 2100008448. Its totient is φ = 529200000.

The previous prime is 1223140393. The next prime is 1223140403. The reversal of 1223140402 is 2040413221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223140402.

It is not an unprimeable number, because it can be changed into a prime (1223140403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26902 + ... + 56302.

It is an arithmetic number, because the mean of its divisors is an integer number (65625264).

Almost surely, 2^1223140402 is an apocalyptic number.

1223140402 is a deficient number, since it is larger than the sum of its proper divisors (876868046).

1223140402 is a wasteful number, since it uses less digits than its factorization.

1223140402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29506.

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

The square root of 1223140402 is about 34973.4242246881. The cubic root of 1223140402 is about 1069.4457787238.

Adding to 1223140402 its reverse (2040413221), we get a palindrome (3263553623).

The spelling of 1223140402 in words is "one billion, two hundred twenty-three million, one hundred forty thousand, four hundred two".