1055421777 has 8 divisors (see below), whose sum is σ = 1411003264. Its totient is φ = 701727408.

The previous prime is 1055421749. The next prime is 1055421779. The reversal of 1055421777 is 7771245501.

It is a happy number.

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

It is not a de Polignac number, because 1055421777 - 2⁷ = 1055421649 is a prime.

It is a super-2 number, since 2×1055421777² = 2227830254731675458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055421779) 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 in 7 ways as a sum of consecutive naturals, for example, 470473 + ... + 472710.

It is an arithmetic number, because the mean of its divisors is an integer number (176375408).

Almost surely, 2^1055421777 is an apocalyptic number.

It is an amenable number.

1055421777 is a deficient number, since it is larger than the sum of its proper divisors (355581487).

1055421777 is an equidigital number, since it uses as much as digits as its factorization.

1055421777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943559.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 1055421777 is about 32487.2556089307. The cubic root of 1055421777 is about 1018.1427747636.

The spelling of 1055421777 in words is "one billion, fifty-five million, four hundred twenty-one thousand, seven hundred seventy-seven".