103831245 has 90 divisors (see below), whose sum is σ = 216948654. Its totient is φ = 45934560.

The previous prime is 103831243. The next prime is 103831261. The reversal of 103831245 is 542138301.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83064996 + 20766249 = 9114^2 + 4557^2 .

It is not a de Polignac number, because 103831245 - 2¹ = 103831243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103831241) 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 89 ways as a sum of consecutive naturals, for example, 3349380 + ... + 3349410.

Almost surely, 2^103831245 is an apocalyptic number.

103831245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103831245 is an abundant number, since it is smaller than the sum of its proper divisors (113117409).

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

103831245 is an frugal number, since it uses more digits than its factorization.

103831245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 103831245 is about 10189.7617734665. The cubic root of 103831245 is about 470.0124411978.

Multiplying 103831245 by its product of nonzero digits (2880), we get a square (299033985600 = 546840²).

Adding to 103831245 its reverse (542138301), we get a palindrome (645969546).

It can be divided in two parts, 10383 and 1245, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 103831245 in words is "one hundred three million, eight hundred thirty-one thousand, two hundred forty-five".