126405271 has 8 divisors (see below), whose sum is σ = 133942400. Its totient is φ = 118956600.

The previous prime is 126405269. The next prime is 126405277. The reversal of 126405271 is 172504621.

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 126405271 - 2¹ = 126405269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126405277) 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, 19161 + ... + 24898.

It is an arithmetic number, because the mean of its divisors is an integer number (16742800).

Almost surely, 2^126405271 is an apocalyptic number.

126405271 is a deficient number, since it is larger than the sum of its proper divisors (7537129).

126405271 is a wasteful number, since it uses less digits than its factorization.

126405271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44229.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 126405271 is about 11243.0098728054. The cubic root of 126405271 is about 501.8667167309.

Adding to 126405271 its reverse (172504621), we get a palindrome (298909892).

The spelling of 126405271 in words is "one hundred twenty-six million, four hundred five thousand, two hundred seventy-one".