1242214520 has 64 divisors (see below), whose sum is σ = 2840533920. Its totient is φ = 488840704.

The previous prime is 1242214513. The next prime is 1242214529. The reversal of 1242214520 is 254122421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242214529) 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, 972122 + ... + 973398.

Almost surely, 2^1242214520 is an apocalyptic number.

1242214520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242214520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420266960).

1242214520 is an abundant number, since it is smaller than the sum of its proper divisors (1598319400).

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

1242214520 is a wasteful number, since it uses less digits than its factorization.

1242214520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1242214520 is about 35245.0637678527. The cubic root of 1242214520 is about 1074.9762446526.

Adding to 1242214520 its reverse (254122421), we get a palindrome (1496336941).

The spelling of 1242214520 in words is "one billion, two hundred forty-two million, two hundred fourteen thousand, five hundred twenty".