1238255172 has 144 divisors (see below), whose sum is σ = 4008181632. Its totient is φ = 312906240.

The previous prime is 1238255167. The next prime is 1238255177. The reversal of 1238255172 is 2715528321.

1238255172 is a `hidden beast` number, since 1 + 2 + 38 + 2 + 551 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (1238255167) and next prime (1238255177).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1238255177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96528 + ... + 108600.

Almost surely, 2^1238255172 is an apocalyptic number.

1238255172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1238255172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2004090816).

1238255172 is an abundant number, since it is smaller than the sum of its proper divisors (2769926460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1238255172 is a wasteful number, since it uses less digits than its factorization.

1238255172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12138 (or 12133 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 1238255172 is about 35188.8501090900. The cubic root of 1238255172 is about 1073.8329276229.

The spelling of 1238255172 in words is "one billion, two hundred thirty-eight million, two hundred fifty-five thousand, one hundred seventy-two".