1230172251 has 64 divisors (see below), whose sum is σ = 2104836096. Its totient is φ = 620524800.

The previous prime is 1230172249. The next prime is 1230172253. The reversal of 1230172251 is 1522710321.

It is an interprime number because it is at equal distance from previous prime (1230172249) and next prime (1230172253).

It is not a de Polignac number, because 1230172251 - 2¹ = 1230172249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1230172253) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2691615 + ... + 2692071.

It is an arithmetic number, because the mean of its divisors is an integer number (32888064).

Almost surely, 2^1230172251 is an apocalyptic number.

1230172251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1230172251 is a deficient number, since it is larger than the sum of its proper divisors (874663845).

1230172251 is a wasteful number, since it uses less digits than its factorization.

1230172251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1230172251 is about 35073.8114695281. The cubic root of 1230172251 is about 1071.4912827573.

Adding to 1230172251 its reverse (1522710321), we get a palindrome (2752882572).

The spelling of 1230172251 in words is "one billion, two hundred thirty million, one hundred seventy-two thousand, two hundred fifty-one".