1925542161 has 9 divisors (see below), whose sum is σ = 2781528841. Its totient is φ = 1283607012.

The previous prime is 1925542127. The next prime is 1925542181. The reversal of 1925542161 is 1612455291.

The square root of 1925542161 is 43881.

It is a perfect power (a square), and thus also a powerful number.

1925542161 is a `hidden beast` number, since 1 + 92 + 554 + 2 + 16 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1925542161 - 2⁷ = 1925542033 is a prime.

It is a super-2 number, since 2×1925542161² = 7415425227577099842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1925542121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 124330 + ... + 138956.

Almost surely, 2^1925542161 is an apocalyptic number.

1925542161 is the 43881-st square number.

1925542161 is the 21941-st centered octagonal number.

It is an amenable number.

1925542161 is a deficient number, since it is larger than the sum of its proper divisors (855986680).

1925542161 is an frugal number, since it uses more digits than its factorization.

1925542161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29260 (or 14630 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The cubic root of 1925542161 is about 1244.0877412585.

Multiplying 1925542161 by its sum of digits (36), we get a square (69319517796 = 263286²).

It can be divided in two parts, 1925542 and 161, that added together give a triangular number (1925703 = T₁₉₆₂).

The spelling of 1925542161 in words is "one billion, nine hundred twenty-five million, five hundred forty-two thousand, one hundred sixty-one".