70354021 has 4 divisors (see below), whose sum is σ = 70867692. Its totient is φ = 69840352.

The previous prime is 70354013. The next prime is 70354027. The reversal of 70354021 is 12045307.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39551521 + 30802500 = 6289^2 + 5550^2 .

It is a cyclic number.

It is not a de Polignac number, because 70354021 - 2³ = 70354013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70353983 and 70354001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70354027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256630 + ... + 256903.

It is an arithmetic number, because the mean of its divisors is an integer number (17716923).

Almost surely, 2^70354021 is an apocalyptic number.

It is an amenable number.

70354021 is a deficient number, since it is larger than the sum of its proper divisors (513671).

70354021 is a wasteful number, since it uses less digits than its factorization.

70354021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513670.

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

The square root of 70354021 is about 8387.7303843173. The cubic root of 70354021 is about 412.8221341672.

Adding to 70354021 its reverse (12045307), we get a palindrome (82399328).

The spelling of 70354021 in words is "seventy million, three hundred fifty-four thousand, twenty-one".