70868251 has 4 divisors (see below), whose sum is σ = 70897104. Its totient is φ = 70839400.

The previous prime is 70868227. The next prime is 70868279. The reversal of 70868251 is 15286807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15286807 = 1039 ⋅14713.

It is a cyclic number.

It is not a de Polignac number, because 70868251 - 2⁷ = 70868123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70868251.

It is not an unprimeable number, because it can be changed into a prime (70868051) 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, 10360 + ... + 15781.

It is an arithmetic number, because the mean of its divisors is an integer number (17724276).

Almost surely, 2^70868251 is an apocalyptic number.

70868251 is a deficient number, since it is larger than the sum of its proper divisors (28853).

70868251 is a wasteful number, since it uses less digits than its factorization.

70868251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28852.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 70868251 is about 8418.3282782272. The cubic root of 70868251 is about 413.8254902524.

The spelling of 70868251 in words is "seventy million, eight hundred sixty-eight thousand, two hundred fifty-one".