72745130 has 8 divisors (see below), whose sum is σ = 130941252. Its totient is φ = 29098048.

The previous prime is 72745103. The next prime is 72745133. The reversal of 72745130 is 3154727.

It can be written as a sum of positive squares in 2 ways, for example, as 72199009 + 546121 = 8497^2 + 739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72745093 and 72745102.

It is not an unprimeable number, because it can be changed into a prime (72745133) 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, 3637247 + ... + 3637266.

Almost surely, 2^72745130 is an apocalyptic number.

72745130 is a deficient number, since it is larger than the sum of its proper divisors (58196122).

72745130 is a wasteful number, since it uses less digits than its factorization.

72745130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7274520.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72745130 is about 8529.0755653822. The cubic root of 72745130 is about 417.4469651877.

Adding to 72745130 its reverse (3154727), we get a palindrome (75899857).

The spelling of 72745130 in words is "seventy-two million, seven hundred forty-five thousand, one hundred thirty".