140021461 has 2 divisors, whose sum is σ = 140021462. Its totient is φ = 140021460.

The previous prime is 140021449. The next prime is 140021467. The reversal of 140021461 is 164120041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94458961 + 45562500 = 9719^2 + 6750^2 .

It is an emirp because it is prime and its reverse (164120041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140021461 - 2¹¹ = 140019413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140021467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010730 + 70010731.

It is an arithmetic number, because the mean of its divisors is an integer number (70010731).

Almost surely, 2^140021461 is an apocalyptic number.

It is an amenable number.

140021461 is a deficient number, since it is larger than the sum of its proper divisors (1).

140021461 is an equidigital number, since it uses as much as digits as its factorization.

140021461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 140021461 is about 11833.0664242199. The cubic root of 140021461 is about 519.2759412380.

The spelling of 140021461 in words is "one hundred forty million, twenty-one thousand, four hundred sixty-one".