126734621 has 6 divisors (see below), whose sum is σ = 137233530. Its totient is φ = 116985648.

The previous prime is 126734591. The next prime is 126734633. The reversal of 126734621 is 126437621.

It can be written as a sum of positive squares in 3 ways, for example, as 1406596 + 125328025 = 1186^2 + 11195^2 .

It is not a de Polignac number, because 126734621 - 2¹⁴ = 126718237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126734651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374786 + ... + 375123.

It is an arithmetic number, because the mean of its divisors is an integer number (22872255).

Almost surely, 2^126734621 is an apocalyptic number.

It is an amenable number.

126734621 is a deficient number, since it is larger than the sum of its proper divisors (10498909).

126734621 is an equidigital number, since it uses as much as digits as its factorization.

126734621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749935 (or 749922 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 126734621 is about 11257.6472231102. The cubic root of 126734621 is about 502.3022113761.

The spelling of 126734621 in words is "one hundred twenty-six million, seven hundred thirty-four thousand, six hundred twenty-one".