1212252520 has 64 divisors (see below), whose sum is σ = 2832330240. Its totient is φ = 466464000.

The previous prime is 1212252407. The next prime is 1212252533. The reversal of 1212252520 is 252522121.

It is a junction number, because it is equal to n+sod(n) for n = 1212252491 and 1212252500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211695 + ... + 217345.

It is an arithmetic number, because the mean of its divisors is an integer number (44255160).

Almost surely, 2^1212252520 is an apocalyptic number.

1212252520 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 1212252520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1416165120).

1212252520 is an abundant number, since it is smaller than the sum of its proper divisors (1620077720).

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

1212252520 is a wasteful number, since it uses less digits than its factorization.

1212252520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866 (or 5862 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1212252520 is about 34817.4169059108. The cubic root of 1212252520 is about 1066.2630638849.

Adding to 1212252520 its reverse (252522121), we get a palindrome (1464774641).

The spelling of 1212252520 in words is "one billion, two hundred twelve million, two hundred fifty-two thousand, five hundred twenty".