121958 has 12 divisors (see below), whose sum is σ = 195252. Its totient is φ = 57120.

The previous prime is 121951. The next prime is 121963. The reversal of 121958 is 859121.

It is a happy 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 (121951) by changing a digit.

121958 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 473 + ... + 683.

It is an arithmetic number, because the mean of its divisors is an integer number (16271).

2¹²¹⁹⁵⁸ is an apocalyptic number.

121958 is a deficient number, since it is larger than the sum of its proper divisors (73294).

121958 is a wasteful number, since it uses less digits than its factorization.

121958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 230 counting only the distinct ones).

The product of its digits is 720, while the sum is 26.

The square root of 121958 is about 349.2248559310. The cubic root of 121958 is about 49.5910645541.

The spelling of 121958 in words is "one hundred twenty-one thousand, nine hundred fifty-eight".