70152721 has 8 divisors (see below), whose sum is σ = 72621824. Its totient is φ = 67696560.

The previous prime is 70152713. The next prime is 70152767. The reversal of 70152721 is 12725107.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70152721 - 2³ = 70152713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70152791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8530 + ... + 14596.

It is an arithmetic number, because the mean of its divisors is an integer number (9077728).

Almost surely, 2^70152721 is an apocalyptic number.

It is an amenable number.

70152721 is a deficient number, since it is larger than the sum of its proper divisors (2469103).

70152721 is a wasteful number, since it uses less digits than its factorization.

70152721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6471.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 70152721 is about 8375.7221181221. The cubic root of 70152721 is about 412.4280298069.

Adding to 70152721 its reverse (12725107), we get a palindrome (82877828).

The spelling of 70152721 in words is "seventy million, one hundred fifty-two thousand, seven hundred twenty-one".