70273421 has 4 divisors (see below), whose sum is σ = 71063100. Its totient is φ = 69483744.

The previous prime is 70273331. The next prime is 70273429. The reversal of 70273421 is 12437207.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12437207 = 79 ⋅157433.

It can be written as a sum of positive squares in 2 ways, for example, as 31696900 + 38576521 = 5630^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 70273421 - 2¹⁴ = 70257037 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 (70273429) 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, 394706 + ... + 394883.

It is an arithmetic number, because the mean of its divisors is an integer number (17765775).

Almost surely, 2^70273421 is an apocalyptic number.

It is an amenable number.

70273421 is a deficient number, since it is larger than the sum of its proper divisors (789679).

70273421 is an equidigital number, since it uses as much as digits as its factorization.

70273421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789678.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 70273421 is about 8382.9243704092. The cubic root of 70273421 is about 412.6644261545.

The spelling of 70273421 in words is "seventy million, two hundred seventy-three thousand, four hundred twenty-one".