140021541 has 40 divisors (see below), whose sum is σ = 236095200. Its totient is φ = 81920160.

The previous prime is 140021501. The next prime is 140021543. The reversal of 140021541 is 145120041.

It is not a de Polignac number, because 140021541 - 2¹⁵ = 139988773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140021543) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23130 + ... + 28548.

It is an arithmetic number, because the mean of its divisors is an integer number (5902380).

Almost surely, 2^140021541 is an apocalyptic number.

140021541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140021541 is a deficient number, since it is larger than the sum of its proper divisors (96073659).

140021541 is a wasteful number, since it uses less digits than its factorization.

140021541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471 (or 5462 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 140021541 is about 11833.0698045773. The cubic root of 140021541 is about 519.2760401326.

Adding to 140021541 its reverse (145120041), we get a palindrome (285141582).

The spelling of 140021541 in words is "one hundred forty million, twenty-one thousand, five hundred forty-one".