715121 has 4 divisors (see below), whose sum is σ = 780144. Its totient is φ = 650100.

The previous prime is 715109. The next prime is 715123. The reversal of 715121 is 121517.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121517 = 11 ⋅11047.

It is a de Polignac number, because none of the positive numbers 2^k-715121 is a prime.

It is a super-2 number, since 2×715121² = 1022796089282, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 715121.

It is not an unprimeable number, because it can be changed into a prime (715123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32495 + ... + 32516.

It is an arithmetic number, because the mean of its divisors is an integer number (195036).

2⁷¹⁵¹²¹ is an apocalyptic number.

It is an amenable number.

715121 is a deficient number, since it is larger than the sum of its proper divisors (65023).

715121 is a wasteful number, since it uses less digits than its factorization.

715121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65022.

The product of its digits is 70, while the sum is 17.

The square root of 715121 is about 845.6482720375. The cubic root of 715121 is about 89.4251842959.

Adding to 715121 its reverse (121517), we get a palindrome (836638).

The spelling of 715121 in words is "seven hundred fifteen thousand, one hundred twenty-one".