140042545 has 4 divisors (see below), whose sum is σ = 168051060. Its totient is φ = 112034032.

The previous prime is 140042501. The next prime is 140042557. The reversal of 140042545 is 545240041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545240041 = 6803 ⋅80147.

It can be written as a sum of positive squares in 2 ways, for example, as 105925264 + 34117281 = 10292^2 + 5841^2 .

It is a cyclic number.

It is not a de Polignac number, because 140042545 - 2¹¹ = 140040497 is a prime.

It is a super-2 number, since 2×140042545² = 39223828820154050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14004250 + ... + 14004259.

It is an arithmetic number, because the mean of its divisors is an integer number (42012765).

Almost surely, 2^140042545 is an apocalyptic number.

It is an amenable number.

140042545 is a deficient number, since it is larger than the sum of its proper divisors (28008515).

140042545 is an equidigital number, since it uses as much as digits as its factorization.

140042545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28008514.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 140042545 is about 11833.9572840196. The cubic root of 140042545 is about 519.3020035868.

Adding to 140042545 its reverse (545240041), we get a palindrome (685282586).

The spelling of 140042545 in words is "one hundred forty million, forty-two thousand, five hundred forty-five".