40024921 has 2 divisors, whose sum is σ = 40024922. Its totient is φ = 40024920.

The previous prime is 40024903. The next prime is 40024969. The reversal of 40024921 is 12942004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25857225 + 14167696 = 5085^2 + 3764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40024921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40024892 and 40024901.

It is not a weakly prime, because it can be changed into another prime (40024981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20012460 + 20012461.

It is an arithmetic number, because the mean of its divisors is an integer number (20012461).

Almost surely, 2^40024921 is an apocalyptic number.

It is an amenable number.

40024921 is a deficient number, since it is larger than the sum of its proper divisors (1).

40024921 is an equidigital number, since it uses as much as digits as its factorization.

40024921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40024921 is about 6326.5251916040. The cubic root of 40024921 is about 342.0661984415.

Adding to 40024921 its reverse (12942004), we get a palindrome (52966925).

The spelling of 40024921 in words is "forty million, twenty-four thousand, nine hundred twenty-one".