730251261 has 8 divisors (see below), whose sum is σ = 1081853760. Its totient is φ = 486834156.

The previous prime is 730251257. The next prime is 730251271. The reversal of 730251261 is 162152037.

It is a happy number.

It is not a de Polignac number, because 730251261 - 2² = 730251257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 27046343 = 730251261 / (7 + 3 + 0 + 2 + 5 + 1 + 2 + 6 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730251271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13523145 + ... + 13523198.

It is an arithmetic number, because the mean of its divisors is an integer number (135231720).

Almost surely, 2^730251261 is an apocalyptic number.

It is an amenable number.

730251261 is a deficient number, since it is larger than the sum of its proper divisors (351602499).

730251261 is a wasteful number, since it uses less digits than its factorization.

730251261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27046352 (or 27046346 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 730251261 is about 27023.1615655904. The cubic root of 730251261 is about 900.5146278974.

The spelling of 730251261 in words is "seven hundred thirty million, two hundred fifty-one thousand, two hundred sixty-one".