140561406 has 112 divisors (see below), whose sum is σ = 344216304. Its totient is φ = 42861312.

The previous prime is 140561401. The next prime is 140561429. The reversal of 140561406 is 604165041.

140561406 is a `hidden beast` number, since 1 + 40 + 5 + 614 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 140561406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140561401) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1313605 + ... + 1313711.

Almost surely, 2^140561406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140561406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172108152).

140561406 is an abundant number, since it is smaller than the sum of its proper divisors (203654898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140561406 is a wasteful number, since it uses less digits than its factorization.

140561406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 140561406 is about 11855.8595639456. The cubic root of 140561406 is about 519.9425552914.

The spelling of 140561406 in words is "one hundred forty million, five hundred sixty-one thousand, four hundred six".