161405142 has 16 divisors (see below), whose sum is σ = 323205120. Its totient is φ = 53735912.

The previous prime is 161405093. The next prime is 161405143. The reversal of 161405142 is 241504161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161405143) 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, 10998 + ... + 21065.

It is an arithmetic number, because the mean of its divisors is an integer number (20200320).

Almost surely, 2^161405142 is an apocalyptic number.

161405142 is an abundant number, since it is smaller than the sum of its proper divisors (161799978).

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

161405142 is a wasteful number, since it uses less digits than its factorization.

161405142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32907.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 161405142 is about 12704.5323408617. The cubic root of 161405142 is about 544.4681195344.

The spelling of 161405142 in words is "one hundred sixty-one million, four hundred five thousand, one hundred forty-two".