43142449 has 4 divisors (see below), whose sum is σ = 49305664. Its totient is φ = 36979236.

The previous prime is 43142423. The next prime is 43142467. The reversal of 43142449 is 94424134.

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 not a de Polignac number, because 43142449 - 2⁵ = 43142417 is a prime.

It is a super-2 number, since 2×43142449² = 3722541811435202, 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 43142449.

It is not an unprimeable number, because it can be changed into a prime (43145449) 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 3 ways as a sum of consecutive naturals, for example, 3081597 + ... + 3081610.

It is an arithmetic number, because the mean of its divisors is an integer number (12326416).

Almost surely, 2^43142449 is an apocalyptic number.

It is an amenable number.

43142449 is a deficient number, since it is larger than the sum of its proper divisors (6163215).

43142449 is an equidigital number, since it uses as much as digits as its factorization.

43142449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6163214.

The product of its digits is 13824, while the sum is 31.

The square root of 43142449 is about 6568.2911780767. The cubic root of 43142449 is about 350.7262443932.

The spelling of 43142449 in words is "forty-three million, one hundred forty-two thousand, four hundred forty-nine".