126891418 has 8 divisors (see below), whose sum is σ = 193563360. Its totient is φ = 62370300.

The previous prime is 126891397. The next prime is 126891431. The reversal of 126891418 is 814198621.

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

It is a super-4 number, since 4×126891418⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537558 + ... + 537793.

It is an arithmetic number, because the mean of its divisors is an integer number (24195420).

Almost surely, 2^126891418 is an apocalyptic number.

126891418 is a deficient number, since it is larger than the sum of its proper divisors (66671942).

126891418 is a wasteful number, since it uses less digits than its factorization.

126891418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075412.

The product of its digits is 27648, while the sum is 40.

The square root of 126891418 is about 11264.6090921967. The cubic root of 126891418 is about 502.5092766618.

The spelling of 126891418 in words is "one hundred twenty-six million, eight hundred ninety-one thousand, four hundred eighteen".