121932405 has 64 divisors (see below), whose sum is σ = 260812800. Its totient is φ = 52799040.

The previous prime is 121932389. The next prime is 121932413. The reversal of 121932405 is 504239121.

It is not a de Polignac number, because 121932405 - 2⁴ = 121932389 is a prime.

It is a super-2 number, since 2×121932405² = 29735022778168050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14560 + ... + 21350.

It is an arithmetic number, because the mean of its divisors is an integer number (4075200).

Almost surely, 2^121932405 is an apocalyptic number.

121932405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121932405 is an abundant number, since it is smaller than the sum of its proper divisors (138880395).

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

121932405 is a wasteful number, since it uses less digits than its factorization.

121932405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831 (or 6825 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 121932405 is about 11042.3007113554. The cubic root of 121932405 is about 495.8759512992.

The spelling of 121932405 in words is "one hundred twenty-one million, nine hundred thirty-two thousand, four hundred five".