7142705 has 4 divisors (see below), whose sum is σ = 8571252. Its totient is φ = 5714160.

The previous prime is 7142699. The next prime is 7142713. The reversal of 7142705 is 5072417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5072417 = 7 ⋅724631.

It can be written as a sum of positive squares in 2 ways, for example, as 2337841 + 4804864 = 1529^2 + 2192^2 .

It is not a de Polignac number, because 7142705 - 2¹⁸ = 6880561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714266 + ... + 714275.

It is an arithmetic number, because the mean of its divisors is an integer number (2142813).

Almost surely, 2^7142705 is an apocalyptic number.

It is an amenable number.

7142705 is a deficient number, since it is larger than the sum of its proper divisors (1428547).

7142705 is a wasteful number, since it uses less digits than its factorization.

7142705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428546.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 7142705 is about 2672.5839556504. The cubic root of 7142705 is about 192.5843111874.

The spelling of 7142705 in words is "seven million, one hundred forty-two thousand, seven hundred five".