161025473 has 4 divisors (see below), whose sum is σ = 184029120. Its totient is φ = 138021828.

The previous prime is 161025457. The next prime is 161025503. The reversal of 161025473 is 374520161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161025473 - 2⁴ = 161025457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161025413) 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, 11501813 + ... + 11501826.

It is an arithmetic number, because the mean of its divisors is an integer number (46007280).

Almost surely, 2^161025473 is an apocalyptic number.

It is an amenable number.

161025473 is a deficient number, since it is larger than the sum of its proper divisors (23003647).

161025473 is an equidigital number, since it uses as much as digits as its factorization.

161025473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23003646.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 161025473 is about 12689.5812775678. The cubic root of 161025473 is about 544.0408717579.

The spelling of 161025473 in words is "one hundred sixty-one million, twenty-five thousand, four hundred seventy-three".