1290245 has 8 divisors (see below), whose sum is σ = 1689120. Its totient is φ = 938320.

The previous prime is 1290209. The next prime is 1290257. The reversal of 1290245 is 5420921.

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

It is not a de Polignac number, because 1290245 - 2¹² = 1286149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1290245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11675 + ... + 11784.

It is an arithmetic number, because the mean of its divisors is an integer number (211140).

2^1290245 is an apocalyptic number.

It is an amenable number.

1290245 is a deficient number, since it is larger than the sum of its proper divisors (398875).

1290245 is a wasteful number, since it uses less digits than its factorization.

1290245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23475.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1290245 is about 1135.8895192755. The cubic root of 1290245 is about 108.8656144820.

The spelling of 1290245 in words is "one million, two hundred ninety thousand, two hundred forty-five".