140405266 has 8 divisors (see below), whose sum is σ = 211900464. Its totient is φ = 69771780.

The previous prime is 140405173. The next prime is 140405297. The reversal of 140405266 is 662504041.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215020 + ... + 215671.

It is an arithmetic number, because the mean of its divisors is an integer number (26487558).

Almost surely, 2^140405266 is an apocalyptic number.

140405266 is a deficient number, since it is larger than the sum of its proper divisors (71495198).

140405266 is a wasteful number, since it uses less digits than its factorization.

140405266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430856.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 140405266 is about 11849.2728046914. The cubic root of 140405266 is about 519.7499611506.

It can be divided in two parts, 14040 and 5266, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 140405266 in words is "one hundred forty million, four hundred five thousand, two hundred sixty-six".