140039481 has 24 divisors (see below), whose sum is σ = 198388224. Its totient is φ = 87852960.

The previous prime is 140039467. The next prime is 140039483. The reversal of 140039481 is 184930041.

It is a happy number.

It is not a de Polignac number, because 140039481 - 2²⁶ = 72930617 is a prime.

It is a super-2 number, since 2×140039481² = 39222112477498722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140039483) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 206515 + ... + 207191.

It is an arithmetic number, because the mean of its divisors is an integer number (8266176).

Almost surely, 2^140039481 is an apocalyptic number.

It is an amenable number.

140039481 is a deficient number, since it is larger than the sum of its proper divisors (58348743).

140039481 is a wasteful number, since it uses less digits than its factorization.

140039481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 140039481 is about 11833.8278253488. The cubic root of 140039481 is about 519.2982162784.

The spelling of 140039481 in words is "one hundred forty million, thirty-nine thousand, four hundred eighty-one".