43135245 has 24 divisors (see below), whose sum is σ = 74921496. Its totient is φ = 22958208.

The previous prime is 43135243. The next prime is 43135247. The reversal of 43135245 is 54253134.

It is an interprime number because it is at equal distance from previous prime (43135243) and next prime (43135247).

It can be written as a sum of positive squares in 4 ways, for example, as 24029604 + 19105641 = 4902^2 + 4371^2 .

It is not a de Polignac number, because 43135245 - 2¹ = 43135243 is a prime.

It is a super-2 number, since 2×43135245² = 3721298722420050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43135243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38919 + ... + 40011.

It is an arithmetic number, because the mean of its divisors is an integer number (3121729).

Almost surely, 2^43135245 is an apocalyptic number.

43135245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43135245 is a deficient number, since it is larger than the sum of its proper divisors (31786251).

43135245 is a wasteful number, since it uses less digits than its factorization.

43135245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1978 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 43135245 is about 6567.7427629285. The cubic root of 43135245 is about 350.7067216836.

Adding to 43135245 its reverse (54253134), we get a palindrome (97388379).

The spelling of 43135245 in words is "forty-three million, one hundred thirty-five thousand, two hundred forty-five".