1242513224 has 8 divisors (see below), whose sum is σ = 2329712310. Its totient is φ = 621256608.

The previous prime is 1242513179. The next prime is 1242513253. The reversal of 1242513224 is 4223152421.

It can be written as a sum of positive squares in only one way, i.e., 798062500 + 444450724 = 28250^2 + 21082^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1242513224² = 3087678223629748352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242513193 and 1242513202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77657069 + ... + 77657084.

Almost surely, 2^1242513224 is an apocalyptic number.

It is an amenable number.

1242513224 is a deficient number, since it is larger than the sum of its proper divisors (1087199086).

1242513224 is a wasteful number, since it uses less digits than its factorization.

1242513224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155314159 (or 155314155 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 1242513224 is about 35249.3010427157. The cubic root of 1242513224 is about 1075.0624009928.

Adding to 1242513224 its reverse (4223152421), we get a palindrome (5465665645).

The spelling of 1242513224 in words is "one billion, two hundred forty-two million, five hundred thirteen thousand, two hundred twenty-four".