140420402 has 8 divisors (see below), whose sum is σ = 216323436. Its totient is φ = 68312592.

The previous prime is 140420377. The next prime is 140420417. The reversal of 140420402 is 204024041.

It can be written as a sum of positive squares in 2 ways, for example, as 96609241 + 43811161 = 9829^2 + 6619^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 948713 + ... + 948860.

Almost surely, 2^140420402 is an apocalyptic number.

140420402 is a deficient number, since it is larger than the sum of its proper divisors (75903034).

140420402 is a wasteful number, since it uses less digits than its factorization.

140420402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897612.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 140420402 is about 11849.9114764626. The cubic root of 140420402 is about 519.7686372135.

Adding to 140420402 its reverse (204024041), we get a palindrome (344444443).

The spelling of 140420402 in words is "one hundred forty million, four hundred twenty thousand, four hundred two".