126491738 has 4 divisors (see below), whose sum is σ = 189737610. Its totient is φ = 63245868.

The previous prime is 126491731. The next prime is 126491741. The reversal of 126491738 is 837194621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 837194621 = 41 ⋅20419381.

It can be written as a sum of positive squares in only one way, i.e., 107889769 + 18601969 = 10387^2 + 4313^2 .

It is a junction number, because it is equal to n+sod(n) for n = 126491695 and 126491704.

It is not an unprimeable number, because it can be changed into a prime (126491731) 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, 31622933 + ... + 31622936.

Almost surely, 2^126491738 is an apocalyptic number.

126491738 is a deficient number, since it is larger than the sum of its proper divisors (63245872).

126491738 is an equidigital number, since it uses as much as digits as its factorization.

126491738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63245871.

The product of its digits is 72576, while the sum is 41.

The square root of 126491738 is about 11246.8545825044. The cubic root of 126491738 is about 501.9811239285.

The spelling of 126491738 in words is "one hundred twenty-six million, four hundred ninety-one thousand, seven hundred thirty-eight".