45402521 has 4 divisors (see below), whose sum is σ = 45533712. Its totient is φ = 45271332.

The previous prime is 45402491. The next prime is 45402541. The reversal of 45402521 is 12520454.

It is a happy number.

45402521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45402521 - 2¹⁴ = 45386137 is a prime.

It is a super-2 number, since 2×45402521² = 4122777826310882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45402541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65075 + ... + 65768.

It is an arithmetic number, because the mean of its divisors is an integer number (11383428).

Almost surely, 2^45402521 is an apocalyptic number.

It is an amenable number.

45402521 is a deficient number, since it is larger than the sum of its proper divisors (131191).

45402521 is a wasteful number, since it uses less digits than its factorization.

45402521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131190.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 45402521 is about 6738.1392832146. The cubic root of 45402521 is about 356.7467204163.

Adding to 45402521 its reverse (12520454), we get a palindrome (57922975).

The spelling of 45402521 in words is "forty-five million, four hundred two thousand, five hundred twenty-one".