126859531 has 2 divisors, whose sum is σ = 126859532. Its totient is φ = 126859530.

The previous prime is 126859517. The next prime is 126859553. The reversal of 126859531 is 135958621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126859531 - 2¹¹ = 126857483 is a prime.

It is a super-2 number, since 2×126859531² = 32186681211079922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126859511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63429765 + 63429766.

It is an arithmetic number, because the mean of its divisors is an integer number (63429766).

Almost surely, 2^126859531 is an apocalyptic number.

126859531 is a deficient number, since it is larger than the sum of its proper divisors (1).

126859531 is an equidigital number, since it uses as much as digits as its factorization.

126859531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 126859531 is about 11263.1936412369. The cubic root of 126859531 is about 502.4671806821.

The spelling of 126859531 in words is "one hundred twenty-six million, eight hundred fifty-nine thousand, five hundred thirty-one".