1242402213 has 16 divisors (see below), whose sum is σ = 1827475776. Its totient is φ = 745906560.

The previous prime is 1242402199. The next prime is 1242402223. The reversal of 1242402213 is 3122042421.

It is not a de Polignac number, because 1242402213 - 2⁴ = 1242402197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242402213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242402223) 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, 386895 + ... + 390092.

It is an arithmetic number, because the mean of its divisors is an integer number (114217236).

Almost surely, 2^1242402213 is an apocalyptic number.

1242402213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1242402213 is a deficient number, since it is larger than the sum of its proper divisors (585073563).

1242402213 is a wasteful number, since it uses less digits than its factorization.

1242402213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777044.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1242402213 is about 35247.7263522060. The cubic root of 1242402213 is about 1075.0303832768.

Adding to 1242402213 its reverse (3122042421), we get a palindrome (4364444634).

The spelling of 1242402213 in words is "one billion, two hundred forty-two million, four hundred two thousand, two hundred thirteen".