121434520 has 16 divisors (see below), whose sum is σ = 273227760. Its totient is φ = 48573792.

The previous prime is 121434517. The next prime is 121434527. The reversal of 121434520 is 25434121.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121434491 and 121434500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121434527) 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, 1517892 + ... + 1517971.

It is an arithmetic number, because the mean of its divisors is an integer number (17076735).

Almost surely, 2^121434520 is an apocalyptic number.

121434520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121434520 is an abundant number, since it is smaller than the sum of its proper divisors (151793240).

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

121434520 is a wasteful number, since it uses less digits than its factorization.

121434520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035874 (or 3035870 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 121434520 is about 11019.7332091117. The cubic root of 121434520 is about 495.2000959562.

Adding to 121434520 its reverse (25434121), we get a palindrome (146868641).

The spelling of 121434520 in words is "one hundred twenty-one million, four hundred thirty-four thousand, five hundred twenty".