140191285 has 8 divisors (see below), whose sum is σ = 181170360. Its totient is φ = 103525824.

The previous prime is 140191277. The next prime is 140191297. The reversal of 140191285 is 582191041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17380561 + 122810724 = 4169^2 + 11082^2 .

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 140191285 - 2³ = 140191277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078330 + ... + 1078459.

It is an arithmetic number, because the mean of its divisors is an integer number (22646295).

Almost surely, 2^140191285 is an apocalyptic number.

It is an amenable number.

140191285 is a deficient number, since it is larger than the sum of its proper divisors (40979075).

140191285 is a wasteful number, since it uses less digits than its factorization.

140191285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156807.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 140191285 is about 11840.2400735796. The cubic root of 140191285 is about 519.4857897596.

The spelling of 140191285 in words is "one hundred forty million, one hundred ninety-one thousand, two hundred eighty-five".