45001521 has 32 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 28888272.

The previous prime is 45001511. The next prime is 45001531. The reversal of 45001521 is 12510054.

It is an interprime number because it is at equal distance from previous prime (45001511) and next prime (45001531).

It is not a de Polignac number, because 45001521 - 2⁶ = 45001457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45001494 and 45001503.

It is not an unprimeable number, because it can be changed into a prime (45001511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96130 + ... + 96596.

It is an arithmetic number, because the mean of its divisors is an integer number (2162160).

Almost surely, 2^45001521 is an apocalyptic number.

It is an amenable number.

45001521 is a deficient number, since it is larger than the sum of its proper divisors (24187599).

45001521 is a wasteful number, since it uses less digits than its factorization.

45001521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 45001521 is about 6708.3173001879. The cubic root of 45001521 is about 355.6933378370.

Adding to 45001521 its reverse (12510054), we get a palindrome (57511575).

The spelling of 45001521 in words is "forty-five million, one thousand, five hundred twenty-one".