1213402424 has 48 divisors (see below), whose sum is σ = 2481963120. Its totient is φ = 555859200.

The previous prime is 1213402397. The next prime is 1213402429. The reversal of 1213402424 is 4242043121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213402424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213402429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181949 + ... + 188499.

It is an arithmetic number, because the mean of its divisors is an integer number (51707565).

Almost surely, 2^1213402424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213402424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240981560).

1213402424 is an abundant number, since it is smaller than the sum of its proper divisors (1268560696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213402424 is a wasteful number, since it uses less digits than its factorization.

1213402424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720 (or 6703 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1213402424 is about 34833.9263362602. The cubic root of 1213402424 is about 1066.6000983631.

Adding to 1213402424 its reverse (4242043121), we get a palindrome (5455445545).

The spelling of 1213402424 in words is "one billion, two hundred thirteen million, four hundred two thousand, four hundred twenty-four".