7148729 has 8 divisors (see below), whose sum is σ = 8206080. Its totient is φ = 6100416.

The previous prime is 7148717. The next prime is 7148737. The reversal of 7148729 is 9278417.

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

It is a de Polignac number, because none of the positive numbers 2^k-7148729 is a prime.

It is a super-2 number, since 2×7148729² = 102208652630882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7148692 and 7148701.

It is not an unprimeable number, because it can be changed into a prime (7148749) 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, 464 + ... + 3809.

It is an arithmetic number, because the mean of its divisors is an integer number (1025760).

Almost surely, 2^7148729 is an apocalyptic number.

It is an amenable number.

7148729 is a deficient number, since it is larger than the sum of its proper divisors (1057351).

7148729 is a wasteful number, since it uses less digits than its factorization.

7148729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519.

The product of its digits is 28224, while the sum is 38.

The square root of 7148729 is about 2673.7107173365. The cubic root of 7148729 is about 192.6384364290.

The spelling of 7148729 in words is "seven million, one hundred forty-eight thousand, seven hundred twenty-nine".