1098257 has 4 divisors (see below), whose sum is σ = 1156080. Its totient is φ = 1040436.

The previous prime is 1098233. The next prime is 1098269. The reversal of 1098257 is 7528901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7528901 = 263 ⋅28627.

It is a cyclic number.

It is not a de Polignac number, because 1098257 - 2⁶ = 1098193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098287) 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, 28883 + ... + 28920.

It is an arithmetic number, because the mean of its divisors is an integer number (289020).

2^1098257 is an apocalyptic number.

It is an amenable number.

1098257 is a deficient number, since it is larger than the sum of its proper divisors (57823).

1098257 is an equidigital number, since it uses as much as digits as its factorization.

1098257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57822.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1098257 is about 1047.9775760960. The cubic root of 1098257 is about 103.1734595633.

The spelling of 1098257 in words is "one million, ninety-eight thousand, two hundred fifty-seven".