121404491 has 8 divisors (see below), whose sum is σ = 131528544. Its totient is φ = 111392640.

The previous prime is 121404467. The next prime is 121404499. The reversal of 121404491 is 194404121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121404491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121404491.

It is not an unprimeable number, because it can be changed into a prime (121404499) 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, 25790 + ... + 30131.

It is an arithmetic number, because the mean of its divisors is an integer number (16441068).

Almost surely, 2^121404491 is an apocalyptic number.

121404491 is a deficient number, since it is larger than the sum of its proper divisors (10124053).

121404491 is a wasteful number, since it uses less digits than its factorization.

121404491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56101.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 121404491 is about 11018.3706145691. The cubic root of 121404491 is about 495.1592739845.

The spelling of 121404491 in words is "one hundred twenty-one million, four hundred four thousand, four hundred ninety-one".