126642019 has 12 divisors (see below), whose sum is σ = 147501864. Its totient is φ = 108415104.

The previous prime is 126642013. The next prime is 126642029. The reversal of 126642019 is 910246621.

It is not a de Polignac number, because 126642019 - 2¹¹ = 126639971 is a prime.

It is a super-3 number, since 3×126642019³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126642013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73779 + ... + 75475.

It is an arithmetic number, because the mean of its divisors is an integer number (12291822).

Almost surely, 2^126642019 is an apocalyptic number.

126642019 is a deficient number, since it is larger than the sum of its proper divisors (20859845).

126642019 is a wasteful number, since it uses less digits than its factorization.

126642019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3227 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 126642019 is about 11253.5336228227. The cubic root of 126642019 is about 502.1798414386.

The spelling of 126642019 in words is "one hundred twenty-six million, six hundred forty-two thousand, nineteen".