45124821 has 24 divisors (see below), whose sum is σ = 75042240. Its totient is φ = 25595136.

The previous prime is 45124819. The next prime is 45124823. The reversal of 45124821 is 12842154.

It is an interprime number because it is at equal distance from previous prime (45124819) and next prime (45124823).

It is not a de Polignac number, because 45124821 - 2¹ = 45124819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45124823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6181 + ... + 11333.

It is an arithmetic number, because the mean of its divisors is an integer number (3126760).

Almost surely, 2^45124821 is an apocalyptic number.

It is an amenable number.

45124821 is a deficient number, since it is larger than the sum of its proper divisors (29917419).

45124821 is a wasteful number, since it uses less digits than its factorization.

45124821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305 (or 5302 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 45124821 is about 6717.5010978786. The cubic root of 45124821 is about 356.0178971981.

Adding to 45124821 its reverse (12842154), we get a palindrome (57966975).

The spelling of 45124821 in words is "forty-five million, one hundred twenty-four thousand, eight hundred twenty-one".