1053555421 has 2 divisors, whose sum is σ = 1053555422. Its totient is φ = 1053555420.

The previous prime is 1053555383. The next prime is 1053555443. The reversal of 1053555421 is 1245553501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620707396 + 432848025 = 24914^2 + 20805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053555421 - 2¹¹ = 1053553373 is a prime.

It is a super-2 number, since 2×1053555421² = 2219958050236974482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1053555221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526777710 + 526777711.

It is an arithmetic number, because the mean of its divisors is an integer number (526777711).

Almost surely, 2^1053555421 is an apocalyptic number.

It is an amenable number.

1053555421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1053555421 is an equidigital number, since it uses as much as digits as its factorization.

1053555421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1053555421 is about 32458.5184658820. The cubic root of 1053555421 is about 1017.5422761121.

It can be divided in two parts, 10535 and 55421, that added together give a palindrome (65956).

The spelling of 1053555421 in words is "one billion, fifty-three million, five hundred fifty-five thousand, four hundred twenty-one".