1020720098 has 4 divisors (see below), whose sum is σ = 1531080150. Its totient is φ = 510360048.

The previous prime is 1020720089. The next prime is 1020720101. The reversal of 1020720098 is 8900270201.

It is a happy number.

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., 1017418609 + 3301489 = 31897^2 + 1817^2 .

It is a super-2 number, since 2×1020720098² = 2083739036922259208, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020720098.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255180023 + ... + 255180026.

Almost surely, 2^1020720098 is an apocalyptic number.

1020720098 is a deficient number, since it is larger than the sum of its proper divisors (510360052).

1020720098 is an equidigital number, since it uses as much as digits as its factorization.

1020720098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510360051.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1020720098 is about 31948.7104278091. The cubic root of 1020720098 is about 1006.8595384773.

Adding to 1020720098 its reverse (8900270201), we get a palindrome (9920990299).

The spelling of 1020720098 in words is "one billion, twenty million, seven hundred twenty thousand, ninety-eight".