126739405 has 32 divisors (see below), whose sum is σ = 176682240. Its totient is φ = 86469120.

The previous prime is 126739397. The next prime is 126739409. The reversal of 126739405 is 504937621.

It is not a de Polignac number, because 126739405 - 2³ = 126739397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126739409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49384 + ... + 51886.

It is an arithmetic number, because the mean of its divisors is an integer number (5521320).

Almost surely, 2^126739405 is an apocalyptic number.

It is an amenable number.

126739405 is a deficient number, since it is larger than the sum of its proper divisors (49942835).

126739405 is a wasteful number, since it uses less digits than its factorization.

126739405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 126739405 is about 11257.8596988948. The cubic root of 126739405 is about 502.3085316263.

The spelling of 126739405 in words is "one hundred twenty-six million, seven hundred thirty-nine thousand, four hundred five".