70470021 has 8 divisors (see below), whose sum is σ = 96251904. Its totient is φ = 45834080.

The previous prime is 70469983. The next prime is 70470041. The reversal of 70470021 is 12007407.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70470021 - 2¹⁰ = 70468997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70470021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70470041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286341 + ... + 286586.

It is an arithmetic number, because the mean of its divisors is an integer number (12031488).

Almost surely, 2^70470021 is an apocalyptic number.

It is an amenable number.

70470021 is a deficient number, since it is larger than the sum of its proper divisors (25781883).

70470021 is a wasteful number, since it uses less digits than its factorization.

70470021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572971.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 70470021 is about 8394.6423985778. The cubic root of 70470021 is about 413.0488971961.

Adding to 70470021 its reverse (12007407), we get a palindrome (82477428).

The spelling of 70470021 in words is "seventy million, four hundred seventy thousand, twenty-one".