727132145 has 4 divisors (see below), whose sum is σ = 872558580. Its totient is φ = 581705712.

The previous prime is 727132141. The next prime is 727132151. The reversal of 727132145 is 541231727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541231727 = 29 ⋅18663163.

It can be written as a sum of positive squares in 2 ways, for example, as 390299536 + 336832609 = 19756^2 + 18353^2 .

It is a cyclic number.

It is not a de Polignac number, because 727132145 - 2² = 727132141 is a prime.

It is a super-4 number, since 4×727132145⁴ (a number of 37 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (727132141) 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, 72713210 + ... + 72713219.

It is an arithmetic number, because the mean of its divisors is an integer number (218139645).

Almost surely, 2^727132145 is an apocalyptic number.

It is an amenable number.

727132145 is a deficient number, since it is larger than the sum of its proper divisors (145426435).

727132145 is a wasteful number, since it uses less digits than its factorization.

727132145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145426434.

The product of its digits is 11760, while the sum is 32.

The square root of 727132145 is about 26965.3879074639. The cubic root of 727132145 is about 899.2306779601.

The spelling of 727132145 in words is "seven hundred twenty-seven million, one hundred thirty-two thousand, one hundred forty-five".