126001421 has 8 divisors (see below), whose sum is σ = 155078784. Its totient is φ = 99693360.

The previous prime is 126001411. The next prime is 126001457. The reversal of 126001421 is 124100621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126001421 - 2¹⁰ = 126000397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126001421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126001411) 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 7 ways as a sum of consecutive naturals, for example, 692225 + ... + 692406.

It is an arithmetic number, because the mean of its divisors is an integer number (19384848).

Almost surely, 2^126001421 is an apocalyptic number.

It is an amenable number.

126001421 is a deficient number, since it is larger than the sum of its proper divisors (29077363).

126001421 is a wasteful number, since it uses less digits than its factorization.

126001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384651.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 126001421 is about 11225.0354565142. The cubic root of 126001421 is about 501.3316781180.

The spelling of 126001421 in words is "one hundred twenty-six million, one thousand, four hundred twenty-one".