126732406 has 4 divisors (see below), whose sum is σ = 190098612. Its totient is φ = 63366202.

The previous prime is 126732401. The next prime is 126732409. The reversal of 126732406 is 604237621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604237621 = 13 ⋅46479817.

It is a super-2 number, since 2×126732406² = 32122205461097672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126732401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31683100 + ... + 31683103.

It is an arithmetic number, because the mean of its divisors is an integer number (47524653).

Almost surely, 2^126732406 is an apocalyptic number.

126732406 is a deficient number, since it is larger than the sum of its proper divisors (63366206).

126732406 is an equidigital number, since it uses as much as digits as its factorization.

126732406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63366205.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 126732406 is about 11257.5488451083. The cubic root of 126732406 is about 502.2992850358.

The spelling of 126732406 in words is "one hundred twenty-six million, seven hundred thirty-two thousand, four hundred six".