121573830 has 32 divisors (see below), whose sum is σ = 333460224. Its totient is φ = 27788256.

The previous prime is 121573813. The next prime is 121573831. The reversal of 121573830 is 38375121.

It is a super-2 number, since 2×121573830² = 29560392281737800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121573831) 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, 289252 + ... + 289671.

It is an arithmetic number, because the mean of its divisors is an integer number (10420632).

Almost surely, 2^121573830 is an apocalyptic number.

121573830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121573830 is an abundant number, since it is smaller than the sum of its proper divisors (211886394).

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

121573830 is a wasteful number, since it uses less digits than its factorization.

121573830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578940.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 121573830 is about 11026.0523307302. The cubic root of 121573830 is about 495.3893885388.

The spelling of 121573830 in words is "one hundred twenty-one million, five hundred seventy-three thousand, eight hundred thirty".