140021043 has 4 divisors (see below), whose sum is σ = 186694728. Its totient is φ = 93347360.

The previous prime is 140021023. The next prime is 140021107. The reversal of 140021043 is 340120041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340120041 = 3 ⋅113373347.

It is a cyclic number.

It is not a de Polignac number, because 140021043 - 2²² = 135826739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140021003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23336838 + ... + 23336843.

It is an arithmetic number, because the mean of its divisors is an integer number (46673682).

Almost surely, 2^140021043 is an apocalyptic number.

140021043 is a deficient number, since it is larger than the sum of its proper divisors (46673685).

140021043 is an equidigital number, since it uses as much as digits as its factorization.

140021043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46673684.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 140021043 is about 11833.0487618365. The cubic root of 140021043 is about 519.2754245135.

Adding to 140021043 its reverse (340120041), we get a palindrome (480141084).

The spelling of 140021043 in words is "one hundred forty million, twenty-one thousand, forty-three".