126231887 has 4 divisors (see below), whose sum is σ = 126872856. Its totient is φ = 125590920.

The previous prime is 126231881. The next prime is 126231949. The reversal of 126231887 is 788132621.

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 126231887 - 2⁴ = 126231871 is a prime.

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 126231887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126231881) 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, 320189 + ... + 320582.

It is an arithmetic number, because the mean of its divisors is an integer number (31718214).

Almost surely, 2^126231887 is an apocalyptic number.

126231887 is a deficient number, since it is larger than the sum of its proper divisors (640969).

126231887 is an equidigital number, since it uses as much as digits as its factorization.

126231887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640968.

The product of its digits is 32256, while the sum is 38.

The square root of 126231887 is about 11235.2964802892. The cubic root of 126231887 is about 501.6371496315.

The spelling of 126231887 in words is "one hundred twenty-six million, two hundred thirty-one thousand, eight hundred eighty-seven".