71402161 has 4 divisors (see below), whose sum is σ = 72262512. Its totient is φ = 70541812.

The previous prime is 71402131. The next prime is 71402173. The reversal of 71402161 is 16120417.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16120417 = 19 ⋅848443.

It is a cyclic number.

It is not a de Polignac number, because 71402161 - 2⁵ = 71402129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71402131) 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, 430051 + ... + 430216.

It is an arithmetic number, because the mean of its divisors is an integer number (18065628).

Almost surely, 2^71402161 is an apocalyptic number.

It is an amenable number.

71402161 is a deficient number, since it is larger than the sum of its proper divisors (860351).

71402161 is an equidigital number, since it uses as much as digits as its factorization.

71402161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860350.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 71402161 is about 8449.9799408046. The cubic root of 71402161 is about 414.8621228723.

Adding to 71402161 its reverse (16120417), we get a palindrome (87522578).

The spelling of 71402161 in words is "seventy-one million, four hundred two thousand, one hundred sixty-one".