42126091 has 8 divisors (see below), whose sum is σ = 49445600. Its totient is φ = 35131968.

The previous prime is 42126031. The next prime is 42126107. The reversal of 42126091 is 19062124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42126091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42126031) 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 7 ways as a sum of consecutive naturals, for example, 81066 + ... + 81583.

It is an arithmetic number, because the mean of its divisors is an integer number (6180700).

Almost surely, 2^42126091 is an apocalyptic number.

42126091 is a deficient number, since it is larger than the sum of its proper divisors (7319509).

42126091 is a wasteful number, since it uses less digits than its factorization.

42126091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162693.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 42126091 is about 6490.4615398290. The cubic root of 42126091 is about 347.9501706740.

The spelling of 42126091 in words is "forty-two million, one hundred twenty-six thousand, ninety-one".