40390451 has 2 divisors, whose sum is σ = 40390452. Its totient is φ = 40390450.

The previous prime is 40390423. The next prime is 40390463. The reversal of 40390451 is 15409304.

40390451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40390451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40390451.

It is not a weakly prime, because it can be changed into another prime (40390411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20195225 + 20195226.

It is an arithmetic number, because the mean of its divisors is an integer number (20195226).

Almost surely, 2^40390451 is an apocalyptic number.

40390451 is a deficient number, since it is larger than the sum of its proper divisors (1).

40390451 is an equidigital number, since it uses as much as digits as its factorization.

40390451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40390451 is about 6355.3482202001. The cubic root of 40390451 is about 343.1043578568.

Adding to 40390451 its reverse (15409304), we get a palindrome (55799755).

The spelling of 40390451 in words is "forty million, three hundred ninety thousand, four hundred fifty-one".