1098262505 has 4 divisors (see below), whose sum is σ = 1317915012. Its totient is φ = 878610000.

The previous prime is 1098262471. The next prime is 1098262507. The reversal of 1098262505 is 5052628901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5052628901 = 83 ⋅60875047.

It can be written as a sum of positive squares in 2 ways, for example, as 754271296 + 343991209 = 27464^2 + 18547^2 .

It is not a de Polignac number, because 1098262505 - 2¹⁸ = 1098000361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098262507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109826246 + ... + 109826255.

It is an arithmetic number, because the mean of its divisors is an integer number (329478753).

Almost surely, 2^1098262505 is an apocalyptic number.

It is an amenable number.

1098262505 is a deficient number, since it is larger than the sum of its proper divisors (219652507).

1098262505 is an equidigital number, since it uses as much as digits as its factorization.

1098262505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219652506.

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

The square root of 1098262505 is about 33140.0438291804. The cubic root of 1098262505 is about 1031.7363194825.

The spelling of 1098262505 in words is "one billion, ninety-eight million, two hundred sixty-two thousand, five hundred five".