121641449 has 4 divisors (see below), whose sum is σ = 122718036. Its totient is φ = 120564864.

The previous prime is 121641431. The next prime is 121641463. The reversal of 121641449 is 944146121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56355049 + 65286400 = 7507^2 + 8080^2 .

It is a cyclic number.

It is not a de Polignac number, because 121641449 - 2¹⁶ = 121575913 is a prime.

It is a super-2 number, since 2×121641449² = 29593284229639202, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121641469) 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, 538124 + ... + 538349.

It is an arithmetic number, because the mean of its divisors is an integer number (30679509).

Almost surely, 2^121641449 is an apocalyptic number.

It is an amenable number.

121641449 is a deficient number, since it is larger than the sum of its proper divisors (1076587).

121641449 is a wasteful number, since it uses less digits than its factorization.

121641449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076586.

The product of its digits is 6912, while the sum is 32.

The square root of 121641449 is about 11029.1182331137. The cubic root of 121641449 is about 495.4812162140.

It can be divided in two parts, 12 and 1641449, that added together give a palindrome (1641461).

The spelling of 121641449 in words is "one hundred twenty-one million, six hundred forty-one thousand, four hundred forty-nine".