126143531 has 2 divisors, whose sum is σ = 126143532. Its totient is φ = 126143530.

The previous prime is 126143503. The next prime is 126143573. The reversal of 126143531 is 135341621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126143531 - 2¹⁰ = 126142507 is a prime.

It is a super-2 number, since 2×126143531² = 31824380826295922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126143531.

It is not a weakly prime, because it can be changed into another prime (126143231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63071765 + 63071766.

It is an arithmetic number, because the mean of its divisors is an integer number (63071766).

Almost surely, 2^126143531 is an apocalyptic number.

126143531 is a deficient number, since it is larger than the sum of its proper divisors (1).

126143531 is an equidigital number, since it uses as much as digits as its factorization.

126143531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 126143531 is about 11231.3637195133. The cubic root of 126143531 is about 501.5200820181.

The spelling of 126143531 in words is "one hundred twenty-six million, one hundred forty-three thousand, five hundred thirty-one".