1098251 has 16 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 804480.

The previous prime is 1098233. The next prime is 1098269. The reversal of 1098251 is 1528901.

1098251 = 49² + 50² + ... + 150².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1098233) and next prime (1098269).

It is a cyclic number.

It is not a de Polignac number, because 1098251 - 2⁶ = 1098187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1098251.

It is not an unprimeable number, because it can be changed into a prime (1098211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2^1098251 is an apocalyptic number.

1098251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1098251 is a deficient number, since it is larger than the sum of its proper divisors (353269).

1098251 is a wasteful number, since it uses less digits than its factorization.

1098251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1098251 is about 1047.9747134354. The cubic root of 1098251 is about 103.1732716771.

The spelling of 1098251 in words is "one million, ninety-eight thousand, two hundred fifty-one".