161407534 has 4 divisors (see below), whose sum is σ = 242111304. Its totient is φ = 80703766.

The previous prime is 161407523. The next prime is 161407549. The reversal of 161407534 is 435704161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 435704161 = 149 ⋅2924189.

It is a super-2 number, since 2×161407534² = 52104784063922312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161407496 and 161407505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40351882 + ... + 40351885.

It is an arithmetic number, because the mean of its divisors is an integer number (60527826).

Almost surely, 2^161407534 is an apocalyptic number.

161407534 is a deficient number, since it is larger than the sum of its proper divisors (80703770).

161407534 is an equidigital number, since it uses as much as digits as its factorization.

161407534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80703769.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 161407534 is about 12704.6264801449. The cubic root of 161407534 is about 544.4708091664.

The spelling of 161407534 in words is "one hundred sixty-one million, four hundred seven thousand, five hundred thirty-four".