121245523 has 16 divisors (see below), whose sum is σ = 140608000. Its totient is φ = 102404736.

The previous prime is 121245499. The next prime is 121245533. The reversal of 121245523 is 325542121.

It is not a de Polignac number, because 121245523 - 2¹³ = 121237331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121245533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242728 + ... + 243226.

It is an arithmetic number, because the mean of its divisors is an integer number (8788000).

Almost surely, 2^121245523 is an apocalyptic number.

121245523 is a deficient number, since it is larger than the sum of its proper divisors (19362477).

121245523 is a wasteful number, since it uses less digits than its factorization.

121245523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its digits is 2400, while the sum is 25.

The square root of 121245523 is about 11011.1544807981. The cubic root of 121245523 is about 494.9430577631.

Adding to 121245523 its reverse (325542121), we get a palindrome (446787644).

The spelling of 121245523 in words is "one hundred twenty-one million, two hundred forty-five thousand, five hundred twenty-three".