71642254 has 8 divisors (see below), whose sum is σ = 107551368. Its totient is φ = 35791800.

The previous prime is 71642251. The next prime is 71642261. The reversal of 71642254 is 45224617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71642254² = 10265225116401032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71642251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11472 + ... + 16579.

It is an arithmetic number, because the mean of its divisors is an integer number (13443921).

Almost surely, 2^71642254 is an apocalyptic number.

71642254 is a deficient number, since it is larger than the sum of its proper divisors (35909114).

71642254 is a wasteful number, since it uses less digits than its factorization.

71642254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29330.

The product of its digits is 13440, while the sum is 31.

The square root of 71642254 is about 8464.1747382719. The cubic root of 71642254 is about 415.3266002107.

The spelling of 71642254 in words is "seventy-one million, six hundred forty-two thousand, two hundred fifty-four".