43457971 has 4 divisors (see below), whose sum is σ = 45347472. Its totient is φ = 41568472.

The previous prime is 43457969. The next prime is 43458007. The reversal of 43457971 is 17975434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43457971 - 2¹ = 43457969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43457471) 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, 944716 + ... + 944761.

It is an arithmetic number, because the mean of its divisors is an integer number (11336868).

Almost surely, 2^43457971 is an apocalyptic number.

43457971 is a deficient number, since it is larger than the sum of its proper divisors (1889501).

43457971 is a wasteful number, since it uses less digits than its factorization.

43457971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889500.

The product of its digits is 105840, while the sum is 40.

The square root of 43457971 is about 6592.2659988808. The cubic root of 43457971 is about 351.5791797624.

The spelling of 43457971 in words is "forty-three million, four hundred fifty-seven thousand, nine hundred seventy-one".