126543531 has 8 divisors (see below), whose sum is σ = 168816960. Its totient is φ = 84316232.

The previous prime is 126543523. The next prime is 126543577. The reversal of 126543531 is 135345621.

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

It is a cyclic number.

It is not a de Polignac number, because 126543531 - 2³ = 126543523 is a prime.

It is a super-2 number, since 2×126543531² = 32026530475895922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126543031) 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, 4521 + ... + 16538.

It is an arithmetic number, because the mean of its divisors is an integer number (21102120).

Almost surely, 2^126543531 is an apocalyptic number.

126543531 is a deficient number, since it is larger than the sum of its proper divisors (42273429).

126543531 is a wasteful number, since it uses less digits than its factorization.

126543531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23065.

The product of its digits is 10800, while the sum is 30.

The square root of 126543531 is about 11249.1569017416. The cubic root of 126543531 is about 502.0496279037.

The spelling of 126543531 in words is "one hundred twenty-six million, five hundred forty-three thousand, five hundred thirty-one".