1242612520 has 16 divisors (see below), whose sum is σ = 2795878260. Its totient is φ = 497044992.

The previous prime is 1242612509. The next prime is 1242612529. The reversal of 1242612520 is 252162421.

It can be written as a sum of positive squares in 2 ways, for example, as 1218149604 + 24462916 = 34902^2 + 4946^2 .

It is not an unprimeable number, because it can be changed into a prime (1242612529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15532617 + ... + 15532696.

Almost surely, 2^1242612520 is an apocalyptic number.

1242612520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242612520 is an abundant number, since it is smaller than the sum of its proper divisors (1553265740).

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

1242612520 is a wasteful number, since it uses less digits than its factorization.

1242612520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31065324 (or 31065320 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1242612520 is about 35250.7094964059. The cubic root of 1242612520 is about 1075.0910382608.

Adding to 1242612520 its reverse (252162421), we get a palindrome (1494774941).

The spelling of 1242612520 in words is "one billion, two hundred forty-two million, six hundred twelve thousand, five hundred twenty".