126471891 has 72 divisors (see below), whose sum is σ = 225387120. Its totient is φ = 62512128.

The previous prime is 126471889. The next prime is 126471907. The reversal of 126471891 is 198174621.

It is not a de Polignac number, because 126471891 - 2¹ = 126471889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126471841) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 552165 + ... + 552393.

Almost surely, 2^126471891 is an apocalyptic number.

126471891 is a deficient number, since it is larger than the sum of its proper divisors (98915229).

126471891 is a wasteful number, since it uses less digits than its factorization.

126471891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 269 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 126471891 is about 11245.9722123078. The cubic root of 126471891 is about 501.9548683521.

The spelling of 126471891 in words is "one hundred twenty-six million, four hundred seventy-one thousand, eight hundred ninety-one".