43942545 has 12 divisors (see below), whose sum is σ = 76167156. Its totient is φ = 23436000.

The previous prime is 43942537. The next prime is 43942559. The reversal of 43942545 is 54524934.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 23503104 = 4521^2 + 4848^2 .

It is not a de Polignac number, because 43942545 - 2³ = 43942537 is a prime.

It is a super-2 number, since 2×43942545² = 3861894522154050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488206 + ... + 488295.

It is an arithmetic number, because the mean of its divisors is an integer number (6347263).

Almost surely, 2^43942545 is an apocalyptic number.

43942545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43942545 is a deficient number, since it is larger than the sum of its proper divisors (32224611).

43942545 is a wasteful number, since it uses less digits than its factorization.

43942545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976512 (or 976509 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 43942545 is about 6628.9173324156. The cubic root of 43942545 is about 352.8811028393.

The spelling of 43942545 in words is "forty-three million, nine hundred forty-two thousand, five hundred forty-five".