1245505 has 8 divisors (see below), whose sum is σ = 1582632. Its totient is φ = 937728.

The previous prime is 1245479. The next prime is 1245509. The reversal of 1245505 is 5055421.

It can be written as a sum of positive squares in 4 ways, for example, as 440896 + 804609 = 664^2 + 897^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1245505 - 2⁹ = 1244993 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1245509) 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, 7242 + ... + 7411.

It is an arithmetic number, because the mean of its divisors is an integer number (197829).

2^1245505 is an apocalyptic number.

It is an amenable number.

1245505 is a deficient number, since it is larger than the sum of its proper divisors (337127).

1245505 is a wasteful number, since it uses less digits than its factorization.

1245505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14675.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 1245505 is about 1116.0219531891. The cubic root of 1245505 is about 107.5924569644.

The spelling of 1245505 in words is "one million, two hundred forty-five thousand, five hundred five".