70441021 has 16 divisors (see below), whose sum is σ = 84123648. Its totient is φ = 57711600.

The previous prime is 70441003. The next prime is 70441043. The reversal of 70441021 is 12014407.

70441021 = 403² + 404² + ... + 651².

It is a cyclic number.

It is not a de Polignac number, because 70441021 - 2¹⁵ = 70408253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70441021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70444021) 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 in 15 ways as a sum of consecutive naturals, for example, 16056 + ... + 19966.

It is an arithmetic number, because the mean of its divisors is an integer number (5257728).

Almost surely, 2^70441021 is an apocalyptic number.

It is an amenable number.

70441021 is a deficient number, since it is larger than the sum of its proper divisors (13682627).

70441021 is a wasteful number, since it uses less digits than its factorization.

70441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4032.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 70441021 is about 8392.9149286764. The cubic root of 70441021 is about 412.9922297823.

Adding to 70441021 its reverse (12014407), we get a palindrome (82455428).

The spelling of 70441021 in words is "seventy million, four hundred forty-one thousand, twenty-one".