140402505 has 16 divisors (see below), whose sum is σ = 225373824. Its totient is φ = 74638080.

The previous prime is 140402501. The next prime is 140402519. The reversal of 140402505 is 505204041.

It is not a de Polignac number, because 140402505 - 2² = 140402501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140402501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10384 + ... + 19713.

It is an arithmetic number, because the mean of its divisors is an integer number (14085864).

Almost surely, 2^140402505 is an apocalyptic number.

140402505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140402505 is a deficient number, since it is larger than the sum of its proper divisors (84971319).

140402505 is a wasteful number, since it uses less digits than its factorization.

140402505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30416.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 140402505 is about 11849.1562990789. The cubic root of 140402505 is about 519.7465542531.

Adding to 140402505 its reverse (505204041), we get a palindrome (645606546).

The spelling of 140402505 in words is "one hundred forty million, four hundred two thousand, five hundred five".