140400146 has 4 divisors (see below), whose sum is σ = 210600222. Its totient is φ = 70200072.

The previous prime is 140400133. The next prime is 140400173. The reversal of 140400146 is 641004041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641004041 = 17659 ⋅36299.

It can be written as a sum of positive squares in only one way, i.e., 125104225 + 15295921 = 11185^2 + 3911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35100035 + ... + 35100038.

Almost surely, 2^140400146 is an apocalyptic number.

140400146 is a deficient number, since it is larger than the sum of its proper divisors (70200076).

140400146 is an equidigital number, since it uses as much as digits as its factorization.

140400146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70200075.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 140400146 is about 11849.0567557084. The cubic root of 140400146 is about 519.7436433625.

Adding to 140400146 its reverse (641004041), we get a palindrome (781404187).

The spelling of 140400146 in words is "one hundred forty million, four hundred thousand, one hundred forty-six".