140313421 has 2 divisors, whose sum is σ = 140313422. Its totient is φ = 140313420.

The previous prime is 140313413. The next prime is 140313431. The reversal of 140313421 is 124313041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95824521 + 44488900 = 9789^2 + 6670^2 .

It is an emirp because it is prime and its reverse (124313041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140313421 - 2³ = 140313413 is a prime.

It is a super-2 number, since 2×140313421² = 39375712225446482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140313431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70156710 + 70156711.

It is an arithmetic number, because the mean of its divisors is an integer number (70156711).

Almost surely, 2^140313421 is an apocalyptic number.

It is an amenable number.

140313421 is a deficient number, since it is larger than the sum of its proper divisors (1).

140313421 is an equidigital number, since it uses as much as digits as its factorization.

140313421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 140313421 is about 11845.3966164076. The cubic root of 140313421 is about 519.6366063144.

Adding to 140313421 its reverse (124313041), we get a palindrome (264626462).

The spelling of 140313421 in words is "one hundred forty million, three hundred thirteen thousand, four hundred twenty-one".