126723149 has 4 divisors (see below), whose sum is σ = 144826464. Its totient is φ = 108619836.

The previous prime is 126723119. The next prime is 126723161. The reversal of 126723149 is 941327621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126723149 - 2¹² = 126719053 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 (126723119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9051647 + ... + 9051660.

It is an arithmetic number, because the mean of its divisors is an integer number (36206616).

Almost surely, 2^126723149 is an apocalyptic number.

It is an amenable number.

126723149 is a deficient number, since it is larger than the sum of its proper divisors (18103315).

126723149 is an equidigital number, since it uses as much as digits as its factorization.

126723149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18103314.

The product of its digits is 18144, while the sum is 35.

The square root of 126723149 is about 11257.1376912606. The cubic root of 126723149 is about 502.2870548103.

The spelling of 126723149 in words is "one hundred twenty-six million, seven hundred twenty-three thousand, one hundred forty-nine".