181029725 has 6 divisors (see below), whose sum is σ = 224476890. Its totient is φ = 144823760.

The previous prime is 181029713. The next prime is 181029727. The reversal of 181029725 is 527920181.

It can be written as a sum of positive squares in 3 ways, for example, as 4618201 + 176411524 = 2149^2 + 13282^2 .

It is not a de Polignac number, because 181029725 - 2⁶ = 181029661 is a prime.

It is a super-2 number, since 2×181029725² = 65543522667151250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181029727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3620570 + ... + 3620619.

It is an arithmetic number, because the mean of its divisors is an integer number (37412815).

Almost surely, 2^181029725 is an apocalyptic number.

It is an amenable number.

181029725 is a deficient number, since it is larger than the sum of its proper divisors (43447165).

181029725 is an equidigital number, since it uses as much as digits as its factorization.

181029725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7241199 (or 7241194 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 181029725 is about 13454.7287226462. The cubic root of 181029725 is about 565.6962466341.

The spelling of 181029725 in words is "one hundred eighty-one million, twenty-nine thousand, seven hundred twenty-five".