140420121 has 16 divisors (see below), whose sum is σ = 192931200. Its totient is φ = 90788480.

The previous prime is 140420107. The next prime is 140420191. The reversal of 140420121 is 121024041.

It is a cyclic number.

It is not a de Polignac number, because 140420121 - 2⁶ = 140420057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140420121.

It is not an unprimeable number, because it can be changed into a prime (140420101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17980 + ... + 24578.

It is an arithmetic number, because the mean of its divisors is an integer number (12058200).

Almost surely, 2^140420121 is an apocalyptic number.

It is an amenable number.

140420121 is a deficient number, since it is larger than the sum of its proper divisors (52511079).

140420121 is a wasteful number, since it uses less digits than its factorization.

140420121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 140420121 is about 11849.8996198280. The cubic root of 140420121 is about 519.7682905044.

Adding to 140420121 its reverse (121024041), we get a palindrome (261444162).

The spelling of 140420121 in words is "one hundred forty million, four hundred twenty thousand, one hundred twenty-one".