70140251 has 4 divisors (see below), whose sum is σ = 70165272. Its totient is φ = 70115232.

The previous prime is 70140247. The next prime is 70140263. The reversal of 70140251 is 15204107.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15204107 = 1291 ⋅11777.

It is a cyclic number.

It is not a de Polignac number, because 70140251 - 2² = 70140247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70140211) 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, 7685 + ... + 14118.

It is an arithmetic number, because the mean of its divisors is an integer number (17541318).

Almost surely, 2^70140251 is an apocalyptic number.

70140251 is a deficient number, since it is larger than the sum of its proper divisors (25021).

70140251 is a wasteful number, since it uses less digits than its factorization.

70140251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25020.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 70140251 is about 8374.9776716120. The cubic root of 70140251 is about 412.4035913046.

Adding to 70140251 its reverse (15204107), we get a palindrome (85344358).

The spelling of 70140251 in words is "seventy million, one hundred forty thousand, two hundred fifty-one".