1055421138 has 8 divisors (see below), whose sum is σ = 2110842288. Its totient is φ = 351807044.

The previous prime is 1055421137. The next prime is 1055421151. The reversal of 1055421138 is 8311245501.

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

1055421138 is an admirable number.

It is a super-3 number, since 3×1055421138³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1055421131) 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 3 ways as a sum of consecutive naturals, for example, 87951756 + ... + 87951767.

It is an arithmetic number, because the mean of its divisors is an integer number (263855286).

Almost surely, 2^1055421138 is an apocalyptic number.

1055421138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1055421138 is a wasteful number, since it uses less digits than its factorization.

1055421138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175903528.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1055421138 is about 32487.2457743035. The cubic root of 1055421138 is about 1018.1425692870.

Adding to 1055421138 its reverse (8311245501), we get a palindrome (9366666639).

The spelling of 1055421138 in words is "one billion, fifty-five million, four hundred twenty-one thousand, one hundred thirty-eight".