645034 has 8 divisors (see below), whose sum is σ = 1042020. Its totient is φ = 297696.

The previous prime is 645023. The next prime is 645037. The reversal of 645034 is 430546.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 225 = 803^2 + 15^2 .

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

It is a super-2 number, since 2×645034² = 832137722312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 644996 and 645014.

It is not an unprimeable number, because it can be changed into a prime (645037) 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, 12379 + ... + 12430.

2⁶⁴⁵⁰³⁴ is an apocalyptic number.

645034 is a deficient number, since it is larger than the sum of its proper divisors (396986).

645034 is a wasteful number, since it uses less digits than its factorization.

645034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24824.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 645034 is about 803.1400874069. The cubic root of 645034 is about 86.4027441115.

The spelling of 645034 in words is "six hundred forty-five thousand, thirty-four".