1055421771 has 8 divisors (see below), whose sum is σ = 1407413760. Its totient is φ = 703522152.

The previous prime is 1055421749. The next prime is 1055421779. The reversal of 1055421771 is 1771245501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1055421771 - 2¹¹ = 1055419723 is a prime.

It is a super-2 number, since 2×1055421771² = 2227830229401552882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055421779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10590 + ... + 47148.

It is an arithmetic number, because the mean of its divisors is an integer number (175926720).

Almost surely, 2^1055421771 is an apocalyptic number.

1055421771 is a deficient number, since it is larger than the sum of its proper divisors (351991989).

1055421771 is an equidigital number, since it uses as much as digits as its factorization.

1055421771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46185.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 1055421771 is about 32487.2555165868. The cubic root of 1055421771 is about 1018.1427728343.

The spelling of 1055421771 in words is "one billion, fifty-five million, four hundred twenty-one thousand, seven hundred seventy-one".