121620552 has 32 divisors (see below), whose sum is σ = 306247200. Its totient is φ = 40247424.

The previous prime is 121620529. The next prime is 121620571. The reversal of 121620552 is 255026121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 14893 + ... + 21564.

It is an arithmetic number, because the mean of its divisors is an integer number (9570225).

Almost surely, 2^121620552 is an apocalyptic number.

121620552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121620552 is an abundant number, since it is smaller than the sum of its proper divisors (184626648).

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

121620552 is a wasteful number, since it uses less digits than its factorization.

121620552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36605 (or 36601 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 121620552 is about 11028.1708365440. The cubic root of 121620552 is about 495.4528413905.

Adding to 121620552 its reverse (255026121), we get a palindrome (376646673).

The spelling of 121620552 in words is "one hundred twenty-one million, six hundred twenty thousand, five hundred fifty-two".