1213040302 has 4 divisors (see below), whose sum is σ = 1819560456. Its totient is φ = 606520150.

The previous prime is 1213040273. The next prime is 1213040303. The reversal of 1213040302 is 2030403121.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213040303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303260074 + ... + 303260077.

It is an arithmetic number, because the mean of its divisors is an integer number (454890114).

Almost surely, 2^1213040302 is an apocalyptic number.

1213040302 is a deficient number, since it is larger than the sum of its proper divisors (606520154).

1213040302 is an equidigital number, since it uses as much as digits as its factorization.

1213040302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606520153.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1213040302 is about 34828.7281134411. The cubic root of 1213040302 is about 1066.4939841336.

Adding to 1213040302 its reverse (2030403121), we get a palindrome (3243443423).

The spelling of 1213040302 in words is "one billion, two hundred thirteen million, forty thousand, three hundred two".