40920461 has 2 divisors, whose sum is σ = 40920462. Its totient is φ = 40920460.

The previous prime is 40920449. The next prime is 40920463. The reversal of 40920461 is 16402904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22857961 + 18062500 = 4781^2 + 4250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40920461 is a prime.

Together with 40920463, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2486222 and since 40920461 and 2486222 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40920461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40920463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20460230 + 20460231.

It is an arithmetic number, because the mean of its divisors is an integer number (20460231).

Almost surely, 2^40920461 is an apocalyptic number.

It is an amenable number.

40920461 is a deficient number, since it is larger than the sum of its proper divisors (1).

40920461 is an equidigital number, since it uses as much as digits as its factorization.

40920461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 40920461 is about 6396.9102698099. The cubic root of 40920461 is about 344.5985977781.

The spelling of 40920461 in words is "forty million, nine hundred twenty thousand, four hundred sixty-one".