1098135251 has 2 divisors, whose sum is σ = 1098135252. Its totient is φ = 1098135250.

The previous prime is 1098135223. The next prime is 1098135301. The reversal of 1098135251 is 1525318901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1098135251 - 2⁶ = 1098135187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1098135211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549067625 + 549067626.

It is an arithmetic number, because the mean of its divisors is an integer number (549067626).

Almost surely, 2^1098135251 is an apocalyptic number.

1098135251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098135251 is an equidigital number, since it uses as much as digits as its factorization.

1098135251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 1098135251 is about 33138.1238304162. The cubic root of 1098135251 is about 1031.6964693725.

The spelling of 1098135251 in words is "one billion, ninety-eight million, one hundred thirty-five thousand, two hundred fifty-one".