161442734 has 16 divisors (see below), whose sum is σ = 257254800. Its totient is φ = 75769344.

The previous prime is 161442733. The next prime is 161442737. The reversal of 161442734 is 437244161.

It is a super-2 number, since 2×161442734² = 52127512722789512, 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 161442734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161442733) 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, 15347 + ... + 23630.

It is an arithmetic number, because the mean of its divisors is an integer number (16078425).

Almost surely, 2^161442734 is an apocalyptic number.

161442734 is a deficient number, since it is larger than the sum of its proper divisors (95812066).

161442734 is a wasteful number, since it uses less digits than its factorization.

161442734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39107.

The product of its digits is 16128, while the sum is 32.

The square root of 161442734 is about 12706.0117267379. The cubic root of 161442734 is about 544.5103859631.

Adding to 161442734 its reverse (437244161), we get a palindrome (598686895).

The spelling of 161442734 in words is "one hundred sixty-one million, four hundred forty-two thousand, seven hundred thirty-four".