121604420 has 24 divisors (see below), whose sum is σ = 291850944. Its totient is φ = 41692896.

The previous prime is 121604411. The next prime is 121604423. The reversal of 121604420 is 24406121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121604392 and 121604401.

It is not an unprimeable number, because it can be changed into a prime (121604423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434162 + ... + 434441.

It is an arithmetic number, because the mean of its divisors is an integer number (12160456).

Almost surely, 2^121604420 is an apocalyptic number.

121604420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121604420 is an abundant number, since it is smaller than the sum of its proper divisors (170246524).

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

121604420 is a wasteful number, since it uses less digits than its factorization.

121604420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868619 (or 868617 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 121604420 is about 11027.4394126651. The cubic root of 121604420 is about 495.4309344608.

The spelling of 121604420 in words is "one hundred twenty-one million, six hundred four thousand, four hundred twenty".