70025721 has 4 divisors (see below), whose sum is σ = 93367632. Its totient is φ = 46683812.

The previous prime is 70025717. The next prime is 70025741. The reversal of 70025721 is 12752007.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70025721 - 2² = 70025717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70025691 and 70025700.

It is not an unprimeable number, because it can be changed into a prime (70025701) 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, 11670951 + ... + 11670956.

It is an arithmetic number, because the mean of its divisors is an integer number (23341908).

Almost surely, 2^70025721 is an apocalyptic number.

It is an amenable number.

70025721 is a deficient number, since it is larger than the sum of its proper divisors (23341911).

70025721 is a wasteful number, since it uses less digits than its factorization.

70025721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23341910.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 70025721 is about 8368.1372479184. The cubic root of 70025721 is about 412.1790016944.

Adding to 70025721 its reverse (12752007), we get a palindrome (82777728).

The spelling of 70025721 in words is "seventy million, twenty-five thousand, seven hundred twenty-one".