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121550 = 252111317
BaseRepresentation
bin11101101011001110
320011201212
4131223032
512342200
62334422
71014242
oct355316
9204655
10121550
1183360
125a412
1343430
1432422
1526035
hex1dace

121550 has 48 divisors (see below), whose sum is σ = 281232. Its totient is φ = 38400.

The previous prime is 121547. The next prime is 121553. The reversal of 121550 is 55121.

It is an interprime number because it is at equal distance from previous prime (121547) and next prime (121553).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7142 + ... + 7158.

It is an arithmetic number, because the mean of its divisors is an integer number (5859).

2121550 is an apocalyptic number.

121550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121550 is an abundant number, since it is smaller than the sum of its proper divisors (159682).

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

121550 is a wasteful number, since it uses less digits than its factorization.

121550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 121550 is about 348.6402156952. The cubic root of 121550 is about 49.5357018906.

Adding to 121550 its reverse (55121), we get a palindrome (176671).

The spelling of 121550 in words is "one hundred twenty-one thousand, five hundred fifty".