1242613220 has 24 divisors (see below), whose sum is σ = 2619199800. Its totient is φ = 495195392.

The previous prime is 1242613187. The next prime is 1242613223. The reversal of 1242613220 is 223162421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 614656 + 1241998564 = 784^2 + 35242^2 .

It is a super-2 number, since 2×1242613220² = 3088175229037536800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242613223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110105 + ... + 120864.

It is an arithmetic number, because the mean of its divisors is an integer number (109133325).

Almost surely, 2^1242613220 is an apocalyptic number.

1242613220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242613220 is an abundant number, since it is smaller than the sum of its proper divisors (1376586580).

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

1242613220 is a wasteful number, since it uses less digits than its factorization.

1242613220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231247 (or 231245 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1242613220 is about 35250.7194252827. The cubic root of 1242613220 is about 1075.0912401376.

Adding to 1242613220 its reverse (223162421), we get a palindrome (1465775641).

The spelling of 1242613220 in words is "one billion, two hundred forty-two million, six hundred thirteen thousand, two hundred twenty".