45345021 has 16 divisors (see below), whose sum is σ = 61900800. Its totient is φ = 29517120.

The previous prime is 45345019. The next prime is 45345023. The reversal of 45345021 is 12054354.

It is an interprime number because it is at equal distance from previous prime (45345019) and next prime (45345023).

It is not a de Polignac number, because 45345021 - 2¹ = 45345019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45344982 and 45345000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45345023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26436 + ... + 28098.

It is an arithmetic number, because the mean of its divisors is an integer number (3868800).

Almost surely, 2^45345021 is an apocalyptic number.

It is an amenable number.

45345021 is a deficient number, since it is larger than the sum of its proper divisors (16555779).

45345021 is a wasteful number, since it uses less digits than its factorization.

45345021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 45345021 is about 6733.8711748889. The cubic root of 45345021 is about 356.5960562270.

Adding to 45345021 its reverse (12054354), we get a palindrome (57399375).

The spelling of 45345021 in words is "forty-five million, three hundred forty-five thousand, twenty-one".