140105451 has 4 divisors (see below), whose sum is σ = 186807272. Its totient is φ = 93403632.

The previous prime is 140105437. The next prime is 140105453. The reversal of 140105451 is 154501041.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 140105451 - 2¹⁰ = 140104427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140105453) 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, 23350906 + ... + 23350911.

It is an arithmetic number, because the mean of its divisors is an integer number (46701818).

Almost surely, 2^140105451 is an apocalyptic number.

140105451 is a deficient number, since it is larger than the sum of its proper divisors (46701821).

140105451 is an equidigital number, since it uses as much as digits as its factorization.

140105451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46701820.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 140105451 is about 11836.6148454700. The cubic root of 140105451 is about 519.3797473938.

Subtracting from 140105451 its sum of digits (21), we obtain a triangular number (140105430 = T₁₆₇₃₉).

Adding to 140105451 its reverse (154501041), we get a palindrome (294606492).

The spelling of 140105451 in words is "one hundred forty million, one hundred five thousand, four hundred fifty-one".