70705421 has 8 divisors (see below), whose sum is σ = 72169344. Its totient is φ = 69254640.

The previous prime is 70705399. The next prime is 70705429. The reversal of 70705421 is 12450707.

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 70705421 - 2¹⁸ = 70443277 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 (70705429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7976 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (9021168).

Almost surely, 2^70705421 is an apocalyptic number.

70705421 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

70705421 is a deficient number, since it is larger than the sum of its proper divisors (1463923).

70705421 is a wasteful number, since it uses less digits than its factorization.

70705421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 70705421 is about 8408.6515565815. The cubic root of 70705421 is about 413.5083060072.

The spelling of 70705421 in words is "seventy million, seven hundred five thousand, four hundred twenty-one".