70442751 has 4 divisors (see below), whose sum is σ = 93923672. Its totient is φ = 46961832.

The previous prime is 70442719. The next prime is 70442791. The reversal of 70442751 is 15724407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15724407 = 3 ⋅5241469.

It is not a de Polignac number, because 70442751 - 2⁵ = 70442719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70442791) 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, 11740456 + ... + 11740461.

It is an arithmetic number, because the mean of its divisors is an integer number (23480918).

Almost surely, 2^70442751 is an apocalyptic number.

70442751 is a deficient number, since it is larger than the sum of its proper divisors (23480921).

70442751 is a wasteful number, since it uses less digits than its factorization.

70442751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23480920.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 70442751 is about 8393.0179911638. The cubic root of 70442751 is about 412.9956107228.

The spelling of 70442751 in words is "seventy million, four hundred forty-two thousand, seven hundred fifty-one".