1053726221 has 4 divisors (see below), whose sum is σ = 1056073500. Its totient is φ = 1051378944.

The previous prime is 1053726161. The next prime is 1053726241. The reversal of 1053726221 is 1226273501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1226273501 = 18191 ⋅67411.

It can be written as a sum of positive squares in 2 ways, for example, as 903663721 + 150062500 = 30061^2 + 12250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1053726221 is a prime.

It is a super-2 number, since 2×1053726221² = 2220677897645881682, 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 (1053726241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172966 + ... + 1173863.

It is an arithmetic number, because the mean of its divisors is an integer number (264018375).

Almost surely, 2^1053726221 is an apocalyptic number.

It is an amenable number.

1053726221 is a deficient number, since it is larger than the sum of its proper divisors (2347279).

1053726221 is an equidigital number, since it uses as much as digits as its factorization.

1053726221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347278.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1053726221 is about 32461.1494097175. The cubic root of 1053726221 is about 1017.5972603513.

Adding to 1053726221 its reverse (1226273501), we get a palindrome (2279999722).

The spelling of 1053726221 in words is "one billion, fifty-three million, seven hundred twenty-six thousand, two hundred twenty-one".