161025652 has 6 divisors (see below), whose sum is σ = 281794898. Its totient is φ = 80512824.

The previous prime is 161025647. The next prime is 161025659. The reversal of 161025652 is 256520161.

It can be written as a sum of positive squares in only one way, i.e., 146555236 + 14470416 = 12106^2 + 3804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161025652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161025659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20128203 + ... + 20128210.

Almost surely, 2^161025652 is an apocalyptic number.

It is an amenable number.

161025652 is a deficient number, since it is larger than the sum of its proper divisors (120769246).

161025652 is a wasteful number, since it uses less digits than its factorization.

161025652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40256417 (or 40256415 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 161025652 is about 12689.5883305961. The cubic root of 161025652 is about 544.0410733477.

The spelling of 161025652 in words is "one hundred sixty-one million, twenty-five thousand, six hundred fifty-two".