1017872251 has 4 divisors (see below), whose sum is σ = 1110406104. Its totient is φ = 925338400.

The previous prime is 1017872249. The next prime is 1017872267. The reversal of 1017872251 is 1522787101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1017872251 - 2¹ = 1017872249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1017872551) 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, 46266910 + ... + 46266931.

It is an arithmetic number, because the mean of its divisors is an integer number (277601526).

Almost surely, 2^1017872251 is an apocalyptic number.

1017872251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1017872251 is a deficient number, since it is larger than the sum of its proper divisors (92533853).

1017872251 is an equidigital number, since it uses as much as digits as its factorization.

1017872251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92533852.

The product of its (nonzero) digits is 7840, while the sum is 34.

The square root of 1017872251 is about 31904.1102524424. The cubic root of 1017872251 is about 1005.9222744276.

The spelling of 1017872251 in words is "one billion, seventeen million, eight hundred seventy-two thousand, two hundred fifty-one".