40437121 has 2 divisors, whose sum is σ = 40437122. Its totient is φ = 40437120.

The previous prime is 40437097. The next prime is 40437139. The reversal of 40437121 is 12173404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39828721 + 608400 = 6311^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 40437121 - 2⁷ = 40436993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40437092 and 40437101.

It is not a weakly prime, because it can be changed into another prime (40437191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20218560 + 20218561.

It is an arithmetic number, because the mean of its divisors is an integer number (20218561).

Almost surely, 2^40437121 is an apocalyptic number.

It is an amenable number.

40437121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40437121 is an equidigital number, since it uses as much as digits as its factorization.

40437121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 40437121 is about 6359.0188708636. The cubic root of 40437121 is about 343.2364560511.

The spelling of 40437121 in words is "forty million, four hundred thirty-seven thousand, one hundred twenty-one".