45732781 has 4 divisors (see below), whose sum is σ = 47208064. Its totient is φ = 44257500.

The previous prime is 45732769. The next prime is 45732811. The reversal of 45732781 is 18723754.

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 45732781 - 2⁵ = 45732749 is a prime.

It is a super-2 number, since 2×45732781² = 4182974515987922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45732781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45732761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737595 + ... + 737656.

It is an arithmetic number, because the mean of its divisors is an integer number (11802016).

Almost surely, 2^45732781 is an apocalyptic number.

It is an amenable number.

45732781 is a deficient number, since it is larger than the sum of its proper divisors (1475283).

45732781 is a wasteful number, since it uses less digits than its factorization.

45732781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475282.

The product of its digits is 47040, while the sum is 37.

The square root of 45732781 is about 6762.6016443378. The cubic root of 45732781 is about 357.6096287906.

The spelling of 45732781 in words is "forty-five million, seven hundred thirty-two thousand, seven hundred eighty-one".