121503845 has 16 divisors (see below), whose sum is σ = 154716480. Its totient is φ = 91286784.

The previous prime is 121503757. The next prime is 121503859. The reversal of 121503845 is 548305121.

It is a cyclic number.

It is not a de Polignac number, because 121503845 - 2²² = 117309541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46586 + ... + 49124.

It is an arithmetic number, because the mean of its divisors is an integer number (9669780).

Almost surely, 2^121503845 is an apocalyptic number.

It is an amenable number.

121503845 is a deficient number, since it is larger than the sum of its proper divisors (33212635).

121503845 is a wasteful number, since it uses less digits than its factorization.

121503845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 121503845 is about 11022.8782538863. The cubic root of 121503845 is about 495.2943119335.

Adding to 121503845 its reverse (548305121), we get a palindrome (669808966).

The spelling of 121503845 in words is "one hundred twenty-one million, five hundred three thousand, eight hundred forty-five".