43139975 has 12 divisors (see below), whose sum is σ = 56309640. Its totient is φ = 32695200.

The previous prime is 43139969. The next prime is 43139977. The reversal of 43139975 is 57993134.

It is not a de Polignac number, because 43139975 - 2¹⁰ = 43138951 is a prime.

It is a super-2 number, since 2×43139975² = 3722114886001250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43139977) by changing a digit.

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, 44936 + ... + 45885.

It is an arithmetic number, because the mean of its divisors is an integer number (4692470).

Almost surely, 2^43139975 is an apocalyptic number.

43139975 is a deficient number, since it is larger than the sum of its proper divisors (13169665).

43139975 is a wasteful number, since it uses less digits than its factorization.

43139975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90850 (or 90845 counting only the distinct ones).

The product of its digits is 102060, while the sum is 41.

The square root of 43139975 is about 6568.1028463324. The cubic root of 43139975 is about 350.7195401430.

The spelling of 43139975 in words is "forty-three million, one hundred thirty-nine thousand, nine hundred seventy-five".