70430421 has 4 divisors (see below), whose sum is σ = 93907232. Its totient is φ = 46953612.

The previous prime is 70430411. The next prime is 70430429. The reversal of 70430421 is 12403407.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12403407 = 3 ⋅4134469.

It is not a de Polignac number, because 70430421 - 2¹⁷ = 70299349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70430429) 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, 11738401 + ... + 11738406.

It is an arithmetic number, because the mean of its divisors is an integer number (23476808).

Almost surely, 2^70430421 is an apocalyptic number.

It is an amenable number.

70430421 is a deficient number, since it is larger than the sum of its proper divisors (23476811).

70430421 is a wasteful number, since it uses less digits than its factorization.

70430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23476810.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 70430421 is about 8392.2834199043. The cubic root of 70430421 is about 412.9715129841.

Adding to 70430421 its reverse (12403407), we get a palindrome (82833828).

It can be divided in two parts, 704 and 30421, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 70430421 in words is "seventy million, four hundred thirty thousand, four hundred twenty-one".