35740021 has 2 divisors, whose sum is σ = 35740022. Its totient is φ = 35740020.

The previous prime is 35739989. The next prime is 35740027. The reversal of 35740021 is 12004753.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 4223025 = 5614^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 35740021 - 2⁵ = 35739989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 35739974 and 35740001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35740027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17870010 + 17870011.

It is an arithmetic number, because the mean of its divisors is an integer number (17870011).

Almost surely, 2^35740021 is an apocalyptic number.

It is an amenable number.

35740021 is a deficient number, since it is larger than the sum of its proper divisors (1).

35740021 is an equidigital number, since it uses as much as digits as its factorization.

35740021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 35740021 is about 5978.2958274077. The cubic root of 35740021 is about 329.3959596090.

Adding to 35740021 its reverse (12004753), we get a palindrome (47744774).

The spelling of 35740021 in words is "thirty-five million, seven hundred forty thousand, twenty-one".