1005605498 has 4 divisors (see below), whose sum is σ = 1508408250. Its totient is φ = 502802748.

The previous prime is 1005605453. The next prime is 1005605509. The reversal of 1005605498 is 8945065001.

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

It can be written as a sum of positive squares in only one way, i.e., 594043129 + 411562369 = 24373^2 + 20287^2 .

It is a super-2 number, since 2×1005605498² = 2022484835215656008, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 251401373 + ... + 251401376.

Almost surely, 2^1005605498 is an apocalyptic number.

1005605498 is a deficient number, since it is larger than the sum of its proper divisors (502802752).

1005605498 is an equidigital number, since it uses as much as digits as its factorization.

1005605498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502802751.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 1005605498 is about 31711.2834492709. The cubic root of 1005605498 is about 1001.8650188756.

The spelling of 1005605498 in words is "one billion, five million, six hundred five thousand, four hundred ninety-eight".