1222513542 has 48 divisors (see below), whose sum is σ = 2798331120. Its totient is φ = 384652800.

The previous prime is 1222513541. The next prime is 1222513547. The reversal of 1222513542 is 2453152221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222513541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89742 + ... + 102462.

It is an arithmetic number, because the mean of its divisors is an integer number (58298565).

Almost surely, 2^1222513542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222513542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399165560).

1222513542 is an abundant number, since it is smaller than the sum of its proper divisors (1575817578).

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

1222513542 is a wasteful number, since it uses less digits than its factorization.

1222513542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13029 (or 13026 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1222513542 is about 34964.4611284087. The cubic root of 1222513542 is about 1069.2630503584.

Adding to 1222513542 its reverse (2453152221), we get a palindrome (3675665763).

The spelling of 1222513542 in words is "one billion, two hundred twenty-two million, five hundred thirteen thousand, five hundred forty-two".