40301021 has 2 divisors, whose sum is σ = 40301022. Its totient is φ = 40301020.

The previous prime is 40301017. The next prime is 40301047. The reversal of 40301021 is 12010304.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21724921 + 18576100 = 4661^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 40301021 - 2² = 40301017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40300993 and 40301011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40301321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20150510 + 20150511.

It is an arithmetic number, because the mean of its divisors is an integer number (20150511).

Almost surely, 2^40301021 is an apocalyptic number.

It is an amenable number.

40301021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40301021 is an equidigital number, since it uses as much as digits as its factorization.

40301021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 40301021 is about 6348.3085148723. The cubic root of 40301021 is about 342.8509440265.

Adding to 40301021 its reverse (12010304), we get a palindrome (52311325).

The spelling of 40301021 in words is "forty million, three hundred one thousand, twenty-one".