140721171 has 4 divisors (see below), whose sum is σ = 187628232. Its totient is φ = 93814112.

The previous prime is 140721169. The next prime is 140721173. The reversal of 140721171 is 171127041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171127041 = 3 ⋅57042347.

It is an interprime number because it is at equal distance from previous prime (140721169) and next prime (140721173).

It is a cyclic number.

It is not a de Polignac number, because 140721171 - 2¹ = 140721169 is a prime.

It is a super-2 number, since 2×140721171² = 39604895935222482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140721173) 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, 23453526 + ... + 23453531.

It is an arithmetic number, because the mean of its divisors is an integer number (46907058).

Almost surely, 2^140721171 is an apocalyptic number.

140721171 is a deficient number, since it is larger than the sum of its proper divisors (46907061).

140721171 is an equidigital number, since it uses as much as digits as its factorization.

140721171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46907060.

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 140721171 is about 11862.5954579932. The cubic root of 140721171 is about 520.1394731891.

It can be divided in two parts, 1407 and 21171, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 140721171 in words is "one hundred forty million, seven hundred twenty-one thousand, one hundred seventy-one".