140016251 has 4 divisors (see below), whose sum is σ = 143800512. Its totient is φ = 136231992.

The previous prime is 140016223. The next prime is 140016257. The reversal of 140016251 is 152610041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152610041 = 6823 ⋅22367.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140016251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140016257) 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, 1892075 + ... + 1892148.

It is an arithmetic number, because the mean of its divisors is an integer number (35950128).

Almost surely, 2^140016251 is an apocalyptic number.

140016251 is a deficient number, since it is larger than the sum of its proper divisors (3784261).

140016251 is an equidigital number, since it uses as much as digits as its factorization.

140016251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784260.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 140016251 is about 11832.8462763614. The cubic root of 140016251 is about 519.2695006510.

Adding to 140016251 its reverse (152610041), we get a palindrome (292626292).

The spelling of 140016251 in words is "one hundred forty million, sixteen thousand, two hundred fifty-one".