161477 has 4 divisors (see below), whose sum is σ = 163020. Its totient is φ = 159936.

The previous prime is 161471. The next prime is 161503. The reversal of 161477 is 774161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6241 + 155236 = 79^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 161477 - 2⁴ = 161461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161477.

It is not an unprimeable number, because it can be changed into a prime (161471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (40755).

2¹⁶¹⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

161477 is a deficient number, since it is larger than the sum of its proper divisors (1543).

161477 is a wasteful number, since it uses less digits than its factorization.

161477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542.

The product of its digits is 1176, while the sum is 26.

The square root of 161477 is about 401.8420087547. The cubic root of 161477 is about 54.4548907100.

It can be divided in two parts, 16 and 1477, that multiplied together give a palindrome (23632).

The spelling of 161477 in words is "one hundred sixty-one thousand, four hundred seventy-seven".