126042587 has 4 divisors (see below), whose sum is σ = 137501016. Its totient is φ = 114584160.

The previous prime is 126042551. The next prime is 126042593. The reversal of 126042587 is 785240621.

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 126042587 - 2¹² = 126038491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126042517) 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, 5729198 + ... + 5729219.

It is an arithmetic number, because the mean of its divisors is an integer number (34375254).

Almost surely, 2^126042587 is an apocalyptic number.

126042587 is a deficient number, since it is larger than the sum of its proper divisors (11458429).

126042587 is a wasteful number, since it uses less digits than its factorization.

126042587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11458428.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 126042587 is about 11226.8689758098. The cubic root of 126042587 is about 501.3862689646.

It can be divided in two parts, 1260 and 42587, that multiplied together give a triangular number (53659620 = T₁₀₃₅₉).

The spelling of 126042587 in words is "one hundred twenty-six million, forty-two thousand, five hundred eighty-seven".