126021401 has 8 divisors (see below), whose sum is σ = 137567808. Its totient is φ = 114490000.

The previous prime is 126021377. The next prime is 126021421. The reversal of 126021401 is 104120621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126021401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126021401.

It is not an unprimeable number, because it can be changed into a prime (126021421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20876 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (17195976).

Almost surely, 2^126021401 is an apocalyptic number.

126021401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126021401 is a deficient number, since it is larger than the sum of its proper divisors (11546407).

126021401 is a wasteful number, since it uses less digits than its factorization.

126021401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7503.

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

The square root of 126021401 is about 11225.9253961533. The cubic root of 126021401 is about 501.3581753788.

The spelling of 126021401 in words is "one hundred twenty-six million, twenty-one thousand, four hundred one".