43072501 has 2 divisors, whose sum is σ = 43072502. Its totient is φ = 43072500.

The previous prime is 43072493. The next prime is 43072507. The reversal of 43072501 is 10527034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 18062500 = 5001^2 + 4250^2 .

It is a cyclic number.

It is not a de Polignac number, because 43072501 - 2³ = 43072493 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43072507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21536250 + 21536251.

It is an arithmetic number, because the mean of its divisors is an integer number (21536251).

Almost surely, 2^43072501 is an apocalyptic number.

It is an amenable number.

43072501 is a deficient number, since it is larger than the sum of its proper divisors (1).

43072501 is an equidigital number, since it uses as much as digits as its factorization.

43072501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 43072501 is about 6562.9643454768. The cubic root of 43072501 is about 350.5365945988.

Adding to 43072501 its reverse (10527034), we get a palindrome (53599535).

The spelling of 43072501 in words is "forty-three million, seventy-two thousand, five hundred one".