70242251 has 4 divisors (see below), whose sum is σ = 70259112. Its totient is φ = 70225392.

The previous prime is 70242247. The next prime is 70242257. The reversal of 70242251 is 15224207.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15224207 = 409 ⋅37223.

It is a cyclic number.

It is not a de Polignac number, because 70242251 - 2² = 70242247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70242257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2855 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (17564778).

Almost surely, 2^70242251 is an apocalyptic number.

70242251 is a deficient number, since it is larger than the sum of its proper divisors (16861).

70242251 is an equidigital number, since it uses as much as digits as its factorization.

70242251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16860.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 70242251 is about 8381.0650277873. The cubic root of 70242251 is about 412.6034042574.

Adding to 70242251 its reverse (15224207), we get a palindrome (85466458).

The spelling of 70242251 in words is "seventy million, two hundred forty-two thousand, two hundred fifty-one".