126269987 has 4 divisors (see below), whose sum is σ = 126293616. Its totient is φ = 126246360.

The previous prime is 126269981. The next prime is 126269989. The reversal of 126269987 is 789962621.

It is a happy number.

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 126269987 - 2¹² = 126265891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126269981) 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, 437 + ... + 15897.

It is an arithmetic number, because the mean of its divisors is an integer number (31573404).

Almost surely, 2^126269987 is an apocalyptic number.

126269987 is a deficient number, since it is larger than the sum of its proper divisors (23629).

126269987 is an equidigital number, since it uses as much as digits as its factorization.

126269987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23628.

The product of its digits is 653184, while the sum is 50.

The square root of 126269987 is about 11236.9919017502. The cubic root of 126269987 is about 501.6876135127.

The spelling of 126269987 in words is "one hundred twenty-six million, two hundred sixty-nine thousand, nine hundred eighty-seven".