126891047 has 4 divisors (see below), whose sum is σ = 128147496. Its totient is φ = 125634600.

The previous prime is 126891031. The next prime is 126891053. The reversal of 126891047 is 740198621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126891047 - 2⁴ = 126891031 is a prime.

It is a super-2 number, since 2×126891047² = 32202675617512418, 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 126891047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126891007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628073 + ... + 628274.

It is an arithmetic number, because the mean of its divisors is an integer number (32036874).

Almost surely, 2^126891047 is an apocalyptic number.

126891047 is a deficient number, since it is larger than the sum of its proper divisors (1256449).

126891047 is a wasteful number, since it uses less digits than its factorization.

126891047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256448.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 126891047 is about 11264.5926246802. The cubic root of 126891047 is about 502.5087869226.

The spelling of 126891047 in words is "one hundred twenty-six million, eight hundred ninety-one thousand, forty-seven".