697642 has 16 divisors (see below), whose sum is σ = 1202400. Its totient is φ = 300240.

The previous prime is 697637. The next prime is 697643. The reversal of 697642 is 246796.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 697598 and 697607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697643) 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, 417 + ... + 1252.

It is an arithmetic number, because the mean of its divisors is an integer number (75150).

2⁶⁹⁷⁶⁴² is an apocalyptic number.

697642 is the 418-th decagonal number.

697642 is a deficient number, since it is larger than the sum of its proper divisors (504758).

697642 is a wasteful number, since it uses less digits than its factorization.

697642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701.

The product of its digits is 18144, while the sum is 34.

The square root of 697642 is about 835.2496632744. The cubic root of 697642 is about 88.6905890816.

The spelling of 697642 in words is "six hundred ninety-seven thousand, six hundred forty-two".