126145687 has 4 divisors (see below), whose sum is σ = 127446256. Its totient is φ = 124845120.

The previous prime is 126145673. The next prime is 126145709. The reversal of 126145687 is 786541621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786541621 = 71 ⋅11078051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126145687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126145637) 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, 650139 + ... + 650332.

It is an arithmetic number, because the mean of its divisors is an integer number (31861564).

Almost surely, 2^126145687 is an apocalyptic number.

126145687 is a deficient number, since it is larger than the sum of its proper divisors (1300569).

126145687 is an equidigital number, since it uses as much as digits as its factorization.

126145687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300568.

The product of its digits is 80640, while the sum is 40.

The square root of 126145687 is about 11231.4597003239. The cubic root of 126145687 is about 501.5229392690.

The spelling of 126145687 in words is "one hundred twenty-six million, one hundred forty-five thousand, six hundred eighty-seven".