1212540030 has 80 divisors (see below), whose sum is σ = 3511214784. Its totient is φ = 298468800.

The previous prime is 1212540023. The next prime is 1212540031. The reversal of 1212540030 is 300452121.

1212540030 is a `hidden beast` number, since 121 + 2 + 540 + 0 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212539985 and 1212540012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212540031) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47046 + ... + 68105.

Almost surely, 2^1212540030 is an apocalyptic number.

1212540030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212540030 is an abundant number, since it is smaller than the sum of its proper divisors (2298674754).

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

1212540030 is a wasteful number, since it uses less digits than its factorization.

1212540030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115183 (or 115174 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1212540030 is about 34821.5454855180. The cubic root of 1212540030 is about 1066.3473524457.

Adding to 1212540030 its reverse (300452121), we get a palindrome (1512992151).

The spelling of 1212540030 in words is "one billion, two hundred twelve million, five hundred forty thousand, thirty".