163140742 has 4 divisors (see below), whose sum is σ = 244711116. Its totient is φ = 81570370.

The previous prime is 163140739. The next prime is 163140751. The reversal of 163140742 is 247041361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247041361 = 7 ⋅35291623.

It is a super-2 number, since 2×163140742² = 53229803400621128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163140742.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 40785184 + ... + 40785187.

It is an arithmetic number, because the mean of its divisors is an integer number (61177779).

Almost surely, 2^163140742 is an apocalyptic number.

163140742 is a deficient number, since it is larger than the sum of its proper divisors (81570374).

163140742 is an equidigital number, since it uses as much as digits as its factorization.

163140742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81570373.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 163140742 is about 12772.6560276240. The cubic root of 163140742 is about 546.4127329617.

The spelling of 163140742 in words is "one hundred sixty-three million, one hundred forty thousand, seven hundred forty-two".