121648280 has 32 divisors (see below), whose sum is σ = 294764400. Its totient is φ = 44916096.

The previous prime is 121648273. The next prime is 121648313. The reversal of 121648280 is 82846121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116450 + ... + 117489.

Almost surely, 2^121648280 is an apocalyptic number.

121648280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121648280 is an abundant number, since it is smaller than the sum of its proper divisors (173116120).

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

121648280 is a wasteful number, since it uses less digits than its factorization.

121648280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233963 (or 233959 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 121648280 is about 11029.4279090078. The cubic root of 121648280 is about 495.4904909277.

The spelling of 121648280 in words is "one hundred twenty-one million, six hundred forty-eight thousand, two hundred eighty".