140401555 has 32 divisors (see below), whose sum is σ = 206406144. Its totient is φ = 89488896.

The previous prime is 140401553. The next prime is 140401559. The reversal of 140401555 is 555104041.

It is a happy number.

It is not a de Polignac number, because 140401555 - 2¹ = 140401553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140401553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47964 + ... + 50806.

It is an arithmetic number, because the mean of its divisors is an integer number (6450192).

Almost surely, 2^140401555 is an apocalyptic number.

140401555 is a deficient number, since it is larger than the sum of its proper divisors (66004589).

140401555 is a wasteful number, since it uses less digits than its factorization.

140401555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 140401555 is about 11849.1162117687. The cubic root of 140401555 is about 519.7453820035.

Adding to 140401555 its reverse (555104041), we get a palindrome (695505596).

The spelling of 140401555 in words is "one hundred forty million, four hundred one thousand, five hundred fifty-five".