697145 has 4 divisors (see below), whose sum is σ = 836580. Its totient is φ = 557712.

The previous prime is 697141. The next prime is 697157. The reversal of 697145 is 541796.

It is a happy number.

697145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137641 + 559504 = 371^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 697145 - 2² = 697141 is a prime.

It is a super-2 number, since 2×697145² = 972022302050, which contains 22 as substring.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697145.

It is not an unprimeable number, because it can be changed into a prime (697141) 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, 69710 + ... + 69719.

It is an arithmetic number, because the mean of its divisors is an integer number (209145).

2⁶⁹⁷¹⁴⁵ is an apocalyptic number.

It is an amenable number.

697145 is a deficient number, since it is larger than the sum of its proper divisors (139435).

697145 is a wasteful number, since it uses less digits than its factorization.

697145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139434.

The product of its digits is 7560, while the sum is 32.

The square root of 697145 is about 834.9520944342. The cubic root of 697145 is about 88.6695230266.

The spelling of 697145 in words is "six hundred ninety-seven thousand, one hundred forty-five".