126099987 has 8 divisors (see below), whose sum is σ = 181066704. Its totient is φ = 77599968.

The previous prime is 126099973. The next prime is 126099997. The reversal of 126099987 is 789990621.

It is a happy number.

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

It is not a de Polignac number, because 126099987 - 2¹⁵ = 126067219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126099907) 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, 1616628 + ... + 1616705.

It is an arithmetic number, because the mean of its divisors is an integer number (22633338).

Almost surely, 2^126099987 is an apocalyptic number.

126099987 is a deficient number, since it is larger than the sum of its proper divisors (54966717).

126099987 is a wasteful number, since it uses less digits than its factorization.

126099987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233349.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 126099987 is about 11229.4250520674. The cubic root of 126099987 is about 501.4623681225.

The spelling of 126099987 in words is "one hundred twenty-six million, ninety-nine thousand, nine hundred eighty-seven".