1055561001 has 8 divisors (see below), whose sum is σ = 1535361504. Its totient is φ = 639733920.

The previous prime is 1055560997. The next prime is 1055561009. The reversal of 1055561001 is 1001655501.

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

It is not a de Polignac number, because 1055561001 - 2² = 1055560997 is a prime.

It is a super-2 number, since 2×1055561001² = 2228418053664244002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1055561009) 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, 15993316 + ... + 15993381.

It is an arithmetic number, because the mean of its divisors is an integer number (191920188).

Almost surely, 2^1055561001 is an apocalyptic number.

1055561001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1055561001 is a deficient number, since it is larger than the sum of its proper divisors (479800503).

1055561001 is a wasteful number, since it uses less digits than its factorization.

1055561001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31986711.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1055561001 is about 32489.3982862102. The cubic root of 1055561001 is about 1018.1875415985.

The spelling of 1055561001 in words is "one billion, fifty-five million, five hundred sixty-one thousand, one".