140421145 has 8 divisors (see below), whose sum is σ = 169997256. Its totient is φ = 111342336.

The previous prime is 140421119. The next prime is 140421163. The reversal of 140421145 is 541124041.

It can be written as a sum of positive squares in 4 ways, for example, as 15808576 + 124612569 = 3976^2 + 11163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140421145 - 2²¹ = 138323993 is a prime.

It is a super-2 number, since 2×140421145² = 39436195926222050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123702 + ... + 124831.

It is an arithmetic number, because the mean of its divisors is an integer number (21249657).

Almost surely, 2^140421145 is an apocalyptic number.

It is an amenable number.

140421145 is a deficient number, since it is larger than the sum of its proper divisors (29576111).

140421145 is a wasteful number, since it uses less digits than its factorization.

140421145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248651.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 140421145 is about 11849.9428268663. The cubic root of 140421145 is about 519.7695539544.

Adding to 140421145 its reverse (541124041), we get a palindrome (681545186).

The spelling of 140421145 in words is "one hundred forty million, four hundred twenty-one thousand, one hundred forty-five".