707121 has 6 divisors (see below), whose sum is σ = 1021410. Its totient is φ = 471408.

The previous prime is 707117. The next prime is 707131. The reversal of 707121 is 121707.

Added to its reverse (121707) it gives a triangular number (828828 = T₁₂₈₇).

It can be written as a sum of positive squares in only one way, i.e., 705600 + 1521 = 840^2 + 39^2 .

It is not a de Polignac number, because 707121 - 2² = 707117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 707094 and 707103.

It is not an unprimeable number, because it can be changed into a prime (707111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39276 + ... + 39293.

It is an arithmetic number, because the mean of its divisors is an integer number (170235).

2⁷⁰⁷¹²¹ is an apocalyptic number.

It is an amenable number.

707121 is a deficient number, since it is larger than the sum of its proper divisors (314289).

707121 is a wasteful number, since it uses less digits than its factorization.

707121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78575 (or 78572 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 707121 is about 840.9048697683. The cubic root of 707121 is about 89.0904689628.

Adding to 707121 its reverse (121707), we get a palindrome (828828).

It can be divided in two parts, 707 and 121, that added together give a palindrome (828).

The spelling of 707121 in words is "seven hundred seven thousand, one hundred twenty-one", and thus it is an iban number.