121413 has 4 divisors (see below), whose sum is σ = 161888. Its totient is φ = 80940.

The previous prime is 121403. The next prime is 121421. The reversal of 121413 is 314121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 314121 = 3 ⋅104707.

It is not a de Polignac number, because 121413 - 2⁶ = 121349 is a prime.

It is a super-2 number, since 2×121413² = 29482233138, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

121413 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20233 + ... + 20238.

It is an arithmetic number, because the mean of its divisors is an integer number (40472).

2¹²¹⁴¹³ is an apocalyptic number.

It is an amenable number.

121413 is a deficient number, since it is larger than the sum of its proper divisors (40475).

121413 is an equidigital number, since it uses as much as digits as its factorization.

121413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40474.

The product of its digits is 24, while the sum is 12.

The square root of 121413 is about 348.4436826806. The cubic root of 121413 is about 49.5170841958.

Adding to 121413 its reverse (314121), we get a palindrome (435534).

The spelling of 121413 in words is "one hundred twenty-one thousand, four hundred thirteen".