45203121 has 12 divisors (see below), whose sum is σ = 65656500. Its totient is φ = 29967840.

The previous prime is 45203111. The next prime is 45203129. The reversal of 45203121 is 12130254.

It can be written as a sum of positive squares in 2 ways, for example, as 4562496 + 40640625 = 2136^2 + 6375^2 .

It is not a de Polignac number, because 45203121 - 2⁶ = 45203057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 45203094 and 45203103.

It is not an unprimeable number, because it can be changed into a prime (45203129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12246 + ... + 15503.

It is an arithmetic number, because the mean of its divisors is an integer number (5471375).

Almost surely, 2^45203121 is an apocalyptic number.

It is an amenable number.

45203121 is a deficient number, since it is larger than the sum of its proper divisors (20453379).

45203121 is a wasteful number, since it uses less digits than its factorization.

45203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27936 (or 27933 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 45203121 is about 6723.3266319583. The cubic root of 45203121 is about 356.2236974117.

Adding to 45203121 its reverse (12130254), we get a palindrome (57333375).

The spelling of 45203121 in words is "forty-five million, two hundred three thousand, one hundred twenty-one".