140307405 has 16 divisors (see below), whose sum is σ = 256562304. Its totient is φ = 64140480.

The previous prime is 140307329. The next prime is 140307407. The reversal of 140307405 is 504703041.

It is not a de Polignac number, because 140307405 - 2⁸ = 140307149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140307407) 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, 668026 + ... + 668235.

It is an arithmetic number, because the mean of its divisors is an integer number (16035144).

Almost surely, 2^140307405 is an apocalyptic number.

140307405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140307405 is a deficient number, since it is larger than the sum of its proper divisors (116254899).

140307405 is a wasteful number, since it uses less digits than its factorization.

140307405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336276.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 140307405 is about 11845.1426753754. The cubic root of 140307405 is about 519.6291796585.

The spelling of 140307405 in words is "one hundred forty million, three hundred seven thousand, four hundred five".