140020451 has 2 divisors, whose sum is σ = 140020452. Its totient is φ = 140020450.

The previous prime is 140020429. The next prime is 140020457. The reversal of 140020451 is 154020041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140020451 - 2¹⁰ = 140019427 is a prime.

It is not a weakly prime, because it can be changed into another prime (140020457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010225 + 70010226.

It is an arithmetic number, because the mean of its divisors is an integer number (70010226).

Almost surely, 2^140020451 is an apocalyptic number.

140020451 is a deficient number, since it is larger than the sum of its proper divisors (1).

140020451 is an equidigital number, since it uses as much as digits as its factorization.

140020451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 140020451 is about 11833.0237471240. The cubic root of 140020451 is about 519.2746926914.

Adding to 140020451 its reverse (154020041), we get a palindrome (294040492).

The spelling of 140020451 in words is "one hundred forty million, twenty thousand, four hundred fifty-one".