126455021 has 8 divisors (see below), whose sum is σ = 157658304. Its totient is φ = 98536320.

The previous prime is 126454997. The next prime is 126455033. The reversal of 126455021 is 120554621.

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

It is a cyclic number.

It is not a de Polignac number, because 126455021 - 2¹⁰ = 126453997 is a prime.

It is a super-2 number, since 2×126455021² = 31981744672220882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126455041) 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, 821060 + ... + 821213.

It is an arithmetic number, because the mean of its divisors is an integer number (19707288).

Almost surely, 2^126455021 is an apocalyptic number.

126455021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126455021 is a deficient number, since it is larger than the sum of its proper divisors (31203283).

126455021 is a wasteful number, since it uses less digits than its factorization.

126455021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642291.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 126455021 is about 11245.2221409806. Note that the first 3 decimals coincide. The cubic root of 126455021 is about 501.9325488862.

The spelling of 126455021 in words is "one hundred twenty-six million, four hundred fifty-five thousand, twenty-one".