140420450 has 24 divisors (see below), whose sum is σ = 274930320. Its totient is φ = 53211600.

The previous prime is 140420429. The next prime is 140420453. The reversal of 140420450 is 54024041.

It is not an unprimeable number, because it can be changed into a prime (140420453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72956 + ... + 74855.

It is an arithmetic number, because the mean of its divisors is an integer number (11455430).

Almost surely, 2^140420450 is an apocalyptic number.

140420450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140420450 is a deficient number, since it is larger than the sum of its proper divisors (134509870).

140420450 is a wasteful number, since it uses less digits than its factorization.

140420450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147842 (or 147837 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 140420450 is about 11849.9135017940. The cubic root of 140420450 is about 519.7686964377.

Adding to 140420450 its reverse (54024041), we get a palindrome (194444491).

The spelling of 140420450 in words is "one hundred forty million, four hundred twenty thousand, four hundred fifty".