126049891 has 8 divisors (see below), whose sum is σ = 137824704. Its totient is φ = 114327720.

The previous prime is 126049853. The next prime is 126049907. The reversal of 126049891 is 198940621.

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

It is a cyclic number.

It is not a de Polignac number, because 126049891 - 2²¹ = 123952739 is a prime.

It is a super-2 number, since 2×126049891² = 31777150042223762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126049801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8061 + ... + 17806.

It is an arithmetic number, because the mean of its divisors is an integer number (17228088).

Almost surely, 2^126049891 is an apocalyptic number.

126049891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126049891 is a deficient number, since it is larger than the sum of its proper divisors (11774813).

126049891 is a wasteful number, since it uses less digits than its factorization.

126049891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26321.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 126049891 is about 11227.1942621476. The cubic root of 126049891 is about 501.3959536664.

The spelling of 126049891 in words is "one hundred twenty-six million, forty-nine thousand, eight hundred ninety-one".