121505430 has 32 divisors (see below), whose sum is σ = 301022208. Its totient is φ = 31356000.

The previous prime is 121505411. The next prime is 121505431. The reversal of 121505430 is 34505121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121505397 and 121505406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121505431) 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, 64396 + ... + 66255.

It is an arithmetic number, because the mean of its divisors is an integer number (9406944).

Almost surely, 2^121505430 is an apocalyptic number.

121505430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121505430 is an abundant number, since it is smaller than the sum of its proper divisors (179516778).

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

121505430 is a wasteful number, since it uses less digits than its factorization.

121505430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130692.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 121505430 is about 11022.9501495743. The cubic root of 121505430 is about 495.2964656049.

The spelling of 121505430 in words is "one hundred twenty-one million, five hundred five thousand, four hundred thirty".