140346505 has 8 divisors (see below), whose sum is σ = 181370952. Its totient is φ = 103640448.

The previous prime is 140346467. The next prime is 140346523. The reversal of 140346505 is 505643041.

It can be written as a sum of positive squares in 4 ways, for example, as 5345344 + 135001161 = 2312^2 + 11619^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 140346505 - 2²⁵ = 106792073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079524 + ... + 1079653.

It is an arithmetic number, because the mean of its divisors is an integer number (22671369).

Almost surely, 2^140346505 is an apocalyptic number.

It is an amenable number.

140346505 is a deficient number, since it is larger than the sum of its proper divisors (41024447).

140346505 is a wasteful number, since it uses less digits than its factorization.

140346505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159195.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 140346505 is about 11846.7930259628. The cubic root of 140346505 is about 519.6774441909.

Adding to 140346505 its reverse (505643041), we get a palindrome (645989546).

The spelling of 140346505 in words is "one hundred forty million, three hundred forty-six thousand, five hundred five".