126903221 has 4 divisors (see below), whose sum is σ = 126937932. Its totient is φ = 126868512.

The previous prime is 126903197. The next prime is 126903233. The reversal of 126903221 is 122309621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4468996 + 122434225 = 2114^2 + 11065^2 .

It is a cyclic number.

It is not a de Polignac number, because 126903221 - 2⁶ = 126903157 is a prime.

It is a super-2 number, since 2×126903221² = 32208855000349682, 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 (126903251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11126 + ... + 19431.

It is an arithmetic number, because the mean of its divisors is an integer number (31734483).

Almost surely, 2^126903221 is an apocalyptic number.

It is an amenable number.

126903221 is a deficient number, since it is larger than the sum of its proper divisors (34711).

126903221 is an equidigital number, since it uses as much as digits as its factorization.

126903221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34710.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 126903221 is about 11265.1329774664. The cubic root of 126903221 is about 502.5248567360.

The spelling of 126903221 in words is "one hundred twenty-six million, nine hundred three thousand, two hundred twenty-one".