1055638 has 4 divisors (see below), whose sum is σ = 1583460. Its totient is φ = 527818.

The previous prime is 1055611. The next prime is 1055671. The reversal of 1055638 is 8365501.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1055638² = 2228743174088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263908 + ... + 263911.

It is an arithmetic number, because the mean of its divisors is an integer number (395865).

2^1055638 is an apocalyptic number.

1055638 is a deficient number, since it is larger than the sum of its proper divisors (527822).

1055638 is an equidigital number, since it uses as much as digits as its factorization.

1055638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527821.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1055638 is about 1027.4424558096. The cubic root of 1055638 is about 101.8212298581.

The spelling of 1055638 in words is "one million, fifty-five thousand, six hundred thirty-eight".