74121 has 8 divisors (see below), whose sum is σ = 102144. Its totient is φ = 47760.

The previous prime is 74101. The next prime is 74131. The reversal of 74121 is 12147.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74121 - 2⁹ = 73609 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

74121 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 74121.

It is not an unprimeable number, because it can be changed into a prime (74101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306 + ... + 491.

It is an arithmetic number, because the mean of its divisors is an integer number (12768).

2⁷⁴¹²¹ is an apocalyptic number.

It is an amenable number.

74121 is a deficient number, since it is larger than the sum of its proper divisors (28023).

74121 is a wasteful number, since it uses less digits than its factorization.

74121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831.

The product of its digits is 56, while the sum is 15.

The square root of 74121 is about 272.2517217576. The cubic root of 74121 is about 42.0062349020.

Adding to 74121 its reverse (12147), we get a palindrome (86268).

The spelling of 74121 in words is "seventy-four thousand, one hundred twenty-one", and thus it is an iban number.