126405270 has 24 divisors (see below), whose sum is σ = 328653936. Its totient is φ = 33708048.

The previous prime is 126405269. The next prime is 126405277. The reversal of 126405270 is 72504621.

126405270 is a `hidden beast` number, since 12 + 640 + 5 + 2 + 7 + 0 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 702162 + ... + 702341.

It is an arithmetic number, because the mean of its divisors is an integer number (13693914).

Almost surely, 2^126405270 is an apocalyptic number.

126405270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126405270 is an abundant number, since it is smaller than the sum of its proper divisors (202248666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126405270 is a wasteful number, since it uses less digits than its factorization.

126405270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404516 (or 1404513 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 126405270 is about 11243.0098283333. The cubic root of 126405270 is about 501.8667154074.

Adding to 126405270 its reverse (72504621), we get a palindrome (198909891).

The spelling of 126405270 in words is "one hundred twenty-six million, four hundred five thousand, two hundred seventy".