1001055998 has 8 divisors (see below), whose sum is σ = 1502343408. Its totient is φ = 500274864.

The previous prime is 1001055989. The next prime is 1001056087. The reversal of 1001055998 is 8995501001.

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

It is a super-2 number, since 2×1001055998² = 2004226222263552008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121586 + ... + 129557.

It is an arithmetic number, because the mean of its divisors is an integer number (187792926).

Almost surely, 2^1001055998 is an apocalyptic number.

1001055998 is a deficient number, since it is larger than the sum of its proper divisors (501287410).

1001055998 is a wasteful number, since it uses less digits than its factorization.

1001055998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253138.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 1001055998 is about 31639.4689904872. The cubic root of 1001055998 is about 1000.3518755024.

Adding to 1001055998 its reverse (8995501001), we get a palindrome (9996556999).

The spelling of 1001055998 in words is "one billion, one million, fifty-five thousand, nine hundred ninety-eight".