70721422 has 4 divisors (see below), whose sum is σ = 106082136. Its totient is φ = 35360710.

The previous prime is 70721419. The next prime is 70721429. The reversal of 70721422 is 22412707.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70721429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17680354 + ... + 17680357.

It is an arithmetic number, because the mean of its divisors is an integer number (26520534).

Almost surely, 2^70721422 is an apocalyptic number.

70721422 is a deficient number, since it is larger than the sum of its proper divisors (35360714).

70721422 is a wasteful number, since it uses less digits than its factorization.

70721422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35360713.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 70721422 is about 8409.6029632795. The cubic root of 70721422 is about 413.5394966725.

The spelling of 70721422 in words is "seventy million, seven hundred twenty-one thousand, four hundred twenty-two".