140021347 has 4 divisors (see below), whose sum is σ = 140046840. Its totient is φ = 139995856.

The previous prime is 140021341. The next prime is 140021359. The reversal of 140021347 is 743120041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140021347 - 2²⁷ = 5803619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140021341) 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, 733 + ... + 16750.

It is an arithmetic number, because the mean of its divisors is an integer number (35011710).

Almost surely, 2^140021347 is an apocalyptic number.

140021347 is a deficient number, since it is larger than the sum of its proper divisors (25493).

140021347 is an equidigital number, since it uses as much as digits as its factorization.

140021347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25492.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 140021347 is about 11833.0616072088. The cubic root of 140021347 is about 519.2758003133.

Adding to 140021347 its reverse (743120041), we get a palindrome (883141388).

The spelling of 140021347 in words is "one hundred forty million, twenty-one thousand, three hundred forty-seven".