1055016421 has 2 divisors, whose sum is σ = 1055016422. Its totient is φ = 1055016420.

The previous prime is 1055016419. The next prime is 1055016437. The reversal of 1055016421 is 1246105501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917423521 + 137592900 = 30289^2 + 11730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055016421 - 2¹ = 1055016419 is a prime.

It is a super-2 number, since 2×1055016421² = 2226119297159298482, which contains 22 as substring.

Together with 1055016419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1055016451) 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 as a sum of consecutive naturals, namely, 527508210 + 527508211.

It is an arithmetic number, because the mean of its divisors is an integer number (527508211).

Almost surely, 2^1055016421 is an apocalyptic number.

It is an amenable number.

1055016421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055016421 is an equidigital number, since it uses as much as digits as its factorization.

1055016421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1055016421 is about 32481.0163172275. The cubic root of 1055016421 is about 1018.0124119900.

The spelling of 1055016421 in words is "one billion, fifty-five million, sixteen thousand, four hundred twenty-one".