140820451 has 2 divisors, whose sum is σ = 140820452. Its totient is φ = 140820450.

The previous prime is 140820403. The next prime is 140820461. The reversal of 140820451 is 154028041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140820451 - 2¹⁵ = 140787683 is a prime.

It is not a weakly prime, because it can be changed into another prime (140820461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70410225 + 70410226.

It is an arithmetic number, because the mean of its divisors is an integer number (70410226).

Almost surely, 2^140820451 is an apocalyptic number.

140820451 is a deficient number, since it is larger than the sum of its proper divisors (1).

140820451 is an equidigital number, since it uses as much as digits as its factorization.

140820451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 140820451 is about 11866.7793018999. The cubic root of 140820451 is about 520.2617653958.

Adding to 140820451 its reverse (154028041), we get a palindrome (294848492).

The spelling of 140820451 in words is "one hundred forty million, eight hundred twenty thousand, four hundred fifty-one".