121245403 has 4 divisors (see below), whose sum is σ = 127626760. Its totient is φ = 114864048.

The previous prime is 121245401. The next prime is 121245409. The reversal of 121245403 is 304542121.

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

It is a cyclic number.

It is not a de Polignac number, because 121245403 - 2¹ = 121245401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121245401) 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, 3190650 + ... + 3190687.

It is an arithmetic number, because the mean of its divisors is an integer number (31906690).

Almost surely, 2^121245403 is an apocalyptic number.

121245403 is a deficient number, since it is larger than the sum of its proper divisors (6381357).

121245403 is an equidigital number, since it uses as much as digits as its factorization.

121245403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6381356.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 121245403 is about 11011.1490317768. The cubic root of 121245403 is about 494.9428944768.

Adding to 121245403 its reverse (304542121), we get a palindrome (425787524).

The spelling of 121245403 in words is "one hundred twenty-one million, two hundred forty-five thousand, four hundred three".