70461221 has 4 divisors (see below), whose sum is σ = 71790732. Its totient is φ = 69131712.

The previous prime is 70461217. The next prime is 70461229. The reversal of 70461221 is 12216407.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32330596 + 38130625 = 5686^2 + 6175^2 .

It is a cyclic number.

It is not a de Polignac number, because 70461221 - 2² = 70461217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70461229) 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, 664676 + ... + 664781.

It is an arithmetic number, because the mean of its divisors is an integer number (17947683).

Almost surely, 2^70461221 is an apocalyptic number.

It is an amenable number.

70461221 is a deficient number, since it is larger than the sum of its proper divisors (1329511).

70461221 is a wasteful number, since it uses less digits than its factorization.

70461221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329510.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 70461221 is about 8394.1182383857. The cubic root of 70461221 is about 413.0317032103.

Adding to 70461221 its reverse (12216407), we get a palindrome (82677628).

The spelling of 70461221 in words is "seventy million, four hundred sixty-one thousand, two hundred twenty-one".