140292749 has 16 divisors (see below), whose sum is σ = 149551920. Its totient is φ = 131389440.

The previous prime is 140292743. The next prime is 140292767. The reversal of 140292749 is 947292041.

It can be written as a sum of positive squares in 8 ways, for example, as 3636649 + 136656100 = 1907^2 + 11690^2 .

It is a cyclic number.

It is not a de Polignac number, because 140292749 - 2²⁴ = 123515533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140292743) 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 15 ways as a sum of consecutive naturals, for example, 148619 + ... + 149559.

It is an arithmetic number, because the mean of its divisors is an integer number (9346995).

Almost surely, 2^140292749 is an apocalyptic number.

It is an amenable number.

140292749 is a deficient number, since it is larger than the sum of its proper divisors (9259171).

140292749 is an equidigital number, since it uses as much as digits as its factorization.

140292749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 140292749 is about 11844.5240090094. The cubic root of 140292749 is about 519.6110861719.

The spelling of 140292749 in words is "one hundred forty million, two hundred ninety-two thousand, seven hundred forty-nine".