1053633421 has 4 divisors (see below), whose sum is σ = 1058982012. Its totient is φ = 1048284832.

The previous prime is 1053633403. The next prime is 1053633461. The reversal of 1053633421 is 1243363501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243363501 = 8969 ⋅138629.

It can be written as a sum of positive squares in 2 ways, for example, as 554602500 + 499030921 = 23550^2 + 22339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053633421 - 2⁵ = 1053633389 is a prime.

It is a super-2 number, since 2×1053633421² = 2220286771696326482, which contains 22 as substring.

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 1053633421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053633401) 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, 2674000 + ... + 2674393.

It is an arithmetic number, because the mean of its divisors is an integer number (264745503).

Almost surely, 2^1053633421 is an apocalyptic number.

It is an amenable number.

1053633421 is a deficient number, since it is larger than the sum of its proper divisors (5348591).

1053633421 is an equidigital number, since it uses as much as digits as its factorization.

1053633421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348590.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1053633421 is about 32459.7199772272. The cubic root of 1053633421 is about 1017.5673867478.

Adding to 1053633421 its reverse (1243363501), we get a palindrome (2296996922).

The spelling of 1053633421 in words is "one billion, fifty-three million, six hundred thirty-three thousand, four hundred twenty-one".