140921541 has 12 divisors (see below), whose sum is σ = 207394668. Its totient is φ = 92174784.

The previous prime is 140921533. The next prime is 140921587. The reversal of 140921541 is 145129041.

140921541 is a `hidden beast` number, since 1 + 409 + 215 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 101909025 + 39012516 = 10095^2 + 6246^2 .

It is not a de Polignac number, because 140921541 - 2³ = 140921533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140921531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147240 + ... + 148193.

It is an arithmetic number, because the mean of its divisors is an integer number (17282889).

Almost surely, 2^140921541 is an apocalyptic number.

It is an amenable number.

140921541 is a deficient number, since it is larger than the sum of its proper divisors (66473127).

140921541 is a wasteful number, since it uses less digits than its factorization.

140921541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295492 (or 295489 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 140921541 is about 11871.0379074452. The cubic root of 140921541 is about 520.3862280989.

The spelling of 140921541 in words is "one hundred forty million, nine hundred twenty-one thousand, five hundred forty-one".