126621441 has 16 divisors (see below), whose sum is σ = 187792320. Its totient is φ = 84322080.

The previous prime is 126621433. The next prime is 126621449. The reversal of 126621441 is 144126621.

It is an interprime number because it is at equal distance from previous prime (126621433) and next prime (126621449).

It is not a de Polignac number, because 126621441 - 2³ = 126621433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126621449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30246 + ... + 34176.

It is an arithmetic number, because the mean of its divisors is an integer number (11737020).

Almost surely, 2^126621441 is an apocalyptic number.

It is an amenable number.

126621441 is a deficient number, since it is larger than the sum of its proper divisors (61170879).

126621441 is a wasteful number, since it uses less digits than its factorization.

126621441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133 (or 5127 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 126621441 is about 11252.6192950797. The cubic root of 126621441 is about 502.1526403127.

The spelling of 126621441 in words is "one hundred twenty-six million, six hundred twenty-one thousand, four hundred forty-one".