1053456021 has 6 divisors (see below), whose sum is σ = 1521658710. Its totient is φ = 702304008.

The previous prime is 1053456013. The next prime is 1053456023. The reversal of 1053456021 is 1206543501.

1053456021 is a `hidden beast` number, since 1 + 0 + 53 + 4 + 5 + 602 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 929579121 + 123876900 = 30489^2 + 11130^2 .

It is not a de Polignac number, because 1053456021 - 2³ = 1053456013 is a prime.

It is a super-2 number, since 2×1053456021² = 2219539176362304882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053456023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58525326 + ... + 58525343.

It is an arithmetic number, because the mean of its divisors is an integer number (253609785).

Almost surely, 2^1053456021 is an apocalyptic number.

It is an amenable number.

1053456021 is a deficient number, since it is larger than the sum of its proper divisors (468202689).

1053456021 is a wasteful number, since it uses less digits than its factorization.

1053456021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117050675 (or 117050672 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1053456021 is about 32456.9872446597. The cubic root of 1053456021 is about 1017.5102743521.

Adding to 1053456021 its reverse (1206543501), we get a palindrome (2259999522).

The spelling of 1053456021 in words is "one billion, fifty-three million, four hundred fifty-six thousand, twenty-one".