140420154 has 16 divisors (see below), whose sum is σ = 320960448. Its totient is φ = 40120032.

The previous prime is 140420107. The next prime is 140420191. The reversal of 140420154 is 451024041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 140420154.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1671627 + ... + 1671710.

It is an arithmetic number, because the mean of its divisors is an integer number (20060028).

Almost surely, 2^140420154 is an apocalyptic number.

140420154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

140420154 is an abundant number, since it is smaller than the sum of its proper divisors (180540294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140420154 is a wasteful number, since it uses less digits than its factorization.

140420154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343349.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 140420154 is about 11849.9010122448. The cubic root of 140420154 is about 519.7683312211.

Adding to 140420154 its reverse (451024041), we get a palindrome (591444195).

The spelling of 140420154 in words is "one hundred forty million, four hundred twenty thousand, one hundred fifty-four".