43121371 has 2 divisors, whose sum is σ = 43121372. Its totient is φ = 43121370.

The previous prime is 43121363. The next prime is 43121413. The reversal of 43121371 is 17312134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43121371 - 2³ = 43121363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43121311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21560685 + 21560686.

It is an arithmetic number, because the mean of its divisors is an integer number (21560686).

Almost surely, 2^43121371 is an apocalyptic number.

43121371 is a deficient number, since it is larger than the sum of its proper divisors (1).

43121371 is an equidigital number, since it uses as much as digits as its factorization.

43121371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 43121371 is about 6566.6864551309. The cubic root of 43121371 is about 350.6691172697.

The spelling of 43121371 in words is "forty-three million, one hundred twenty-one thousand, three hundred seventy-one".