121278652 has 24 divisors (see below), whose sum is σ = 232001280. Its totient is φ = 55014960.

The previous prime is 121278649. The next prime is 121278673. The reversal of 121278652 is 256872121.

It is a happy number.

It is a super-2 number, since 2×121278652² = 29417022861874208, which contains 22 as substring.

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, 21549 + ... + 26587.

It is an arithmetic number, because the mean of its divisors is an integer number (9666720).

Almost surely, 2^121278652 is an apocalyptic number.

It is an amenable number.

121278652 is a deficient number, since it is larger than the sum of its proper divisors (110722628).

121278652 is a wasteful number, since it uses less digits than its factorization.

121278652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601 (or 5599 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 121278652 is about 11012.6587162229. The cubic root of 121278652 is about 494.9881328992.

The spelling of 121278652 in words is "one hundred twenty-one million, two hundred seventy-eight thousand, six hundred fifty-two".