121645443 has 8 divisors (see below), whose sum is σ = 162295056. Its totient is φ = 81046400.

The previous prime is 121645439. The next prime is 121645463. The reversal of 121645443 is 344546121.

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

It is a cyclic number.

It is not a de Polignac number, because 121645443 - 2² = 121645439 is a prime.

It is a super-2 number, since 2×121645443² = 29595227605332498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121645443.

It is not an unprimeable number, because it can be changed into a prime (121645463) 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, 6618 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (20286882).

Almost surely, 2^121645443 is an apocalyptic number.

121645443 is a deficient number, since it is larger than the sum of its proper divisors (40649613).

121645443 is a wasteful number, since it uses less digits than its factorization.

121645443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25285.

The product of its digits is 11520, while the sum is 30.

The square root of 121645443 is about 11029.2992977795. The cubic root of 121645443 is about 495.4866390649.

The spelling of 121645443 in words is "one hundred twenty-one million, six hundred forty-five thousand, four hundred forty-three".