43149457 has 8 divisors (see below), whose sum is σ = 46567080. Its totient is φ = 39745920.

The previous prime is 43149439. The next prime is 43149467. The reversal of 43149457 is 75494134.

It can be written as a sum of positive squares in 4 ways, for example, as 14676561 + 28472896 = 3831^2 + 5336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43149457 - 2⁷ = 43149329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43149467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3357 + ... + 9877.

It is an arithmetic number, because the mean of its divisors is an integer number (5820885).

Almost surely, 2^43149457 is an apocalyptic number.

It is an amenable number.

43149457 is a deficient number, since it is larger than the sum of its proper divisors (3417623).

43149457 is a wasteful number, since it uses less digits than its factorization.

43149457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7043.

The product of its digits is 60480, while the sum is 37.

The square root of 43149457 is about 6568.8246285009. The cubic root of 43149457 is about 350.7452338610.

The spelling of 43149457 in words is "forty-three million, one hundred forty-nine thousand, four hundred fifty-seven".