725501641 has 2 divisors, whose sum is σ = 725501642. Its totient is φ = 725501640.

The previous prime is 725501629. The next prime is 725501677. The reversal of 725501641 is 146105527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371911225 + 353590416 = 19285^2 + 18804^2 .

It is a cyclic number.

It is not a de Polignac number, because 725501641 - 2²¹ = 723404489 is a prime.

It is not a weakly prime, because it can be changed into another prime (725501611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362750820 + 362750821.

It is an arithmetic number, because the mean of its divisors is an integer number (362750821).

Almost surely, 2^725501641 is an apocalyptic number.

It is an amenable number.

725501641 is a deficient number, since it is larger than the sum of its proper divisors (1).

725501641 is an equidigital number, since it uses as much as digits as its factorization.

725501641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 725501641 is about 26935.1376643967. The cubic root of 725501641 is about 898.5580370386.

The spelling of 725501641 in words is "seven hundred twenty-five million, five hundred one thousand, six hundred forty-one".