1232140402 has 4 divisors (see below), whose sum is σ = 1848210606. Its totient is φ = 616070200.

The previous prime is 1232140397. The next prime is 1232140409. The reversal of 1232140402 is 2040412321.

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

It can be written as a sum of positive squares in only one way, i.e., 1027907721 + 204232681 = 32061^2 + 14291^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1232140402.

It is not an unprimeable number, because it can be changed into a prime (1232140409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308035099 + ... + 308035102.

Almost surely, 2^1232140402 is an apocalyptic number.

1232140402 is a deficient number, since it is larger than the sum of its proper divisors (616070204).

1232140402 is an equidigital number, since it uses as much as digits as its factorization.

1232140402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616070203.

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

The square root of 1232140402 is about 35101.8575291964. The cubic root of 1232140402 is about 1072.0624041278.

Adding to 1232140402 its reverse (2040412321), we get a palindrome (3272552723).

The spelling of 1232140402 in words is "one billion, two hundred thirty-two million, one hundred forty thousand, four hundred two".