45450781 has 4 divisors (see below), whose sum is σ = 45480672. Its totient is φ = 45420892.

The previous prime is 45450719. The next prime is 45450791. The reversal of 45450781 is 18705454.

45450781 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 45450781 - 2⁷ = 45450653 is a prime.

It is a super-2 number, since 2×45450781² = 4131546987019922, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45450791) 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, 12535 + ... + 15748.

It is an arithmetic number, because the mean of its divisors is an integer number (11370168).

Almost surely, 2^45450781 is an apocalyptic number.

It is an amenable number.

45450781 is a deficient number, since it is larger than the sum of its proper divisors (29891).

45450781 is a wasteful number, since it uses less digits than its factorization.

45450781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29890.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 45450781 is about 6741.7194394309. The cubic root of 45450781 is about 356.8730753697.

The spelling of 45450781 in words is "forty-five million, four hundred fifty thousand, seven hundred eighty-one".