140520251 has 2 divisors, whose sum is σ = 140520252. Its totient is φ = 140520250.

The previous prime is 140520227. The next prime is 140520277. The reversal of 140520251 is 152025041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140520251 - 2⁶ = 140520187 is a prime.

It is a super-2 number, since 2×140520251² = 39491881882206002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140525251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70260125 + 70260126.

It is an arithmetic number, because the mean of its divisors is an integer number (70260126).

Almost surely, 2^140520251 is an apocalyptic number.

140520251 is a deficient number, since it is larger than the sum of its proper divisors (1).

140520251 is an equidigital number, since it uses as much as digits as its factorization.

140520251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 140520251 is about 11854.1237972277. The cubic root of 140520251 is about 519.8918056458.

Adding to 140520251 its reverse (152025041), we get a palindrome (292545292).

The spelling of 140520251 in words is "one hundred forty million, five hundred twenty thousand, two hundred fifty-one".