161497742 has 16 divisors (see below), whose sum is σ = 277503072. Its totient is φ = 69050880.

The previous prime is 161497741. The next prime is 161497753. The reversal of 161497742 is 247794161.

It is a self number, because there is not a number n which added to its sum of digits gives 161497742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161497741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7259 + ... + 19382.

It is an arithmetic number, because the mean of its divisors is an integer number (17343942).

Almost surely, 2^161497742 is an apocalyptic number.

161497742 is a deficient number, since it is larger than the sum of its proper divisors (116005330).

161497742 is a wasteful number, since it uses less digits than its factorization.

161497742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27083.

The product of its digits is 84672, while the sum is 41.

The square root of 161497742 is about 12708.1761870065. The cubic root of 161497742 is about 544.5722221848.

The spelling of 161497742 in words is "one hundred sixty-one million, four hundred ninety-seven thousand, seven hundred forty-two".