1388245 has 8 divisors (see below), whose sum is σ = 1683000. Its totient is φ = 1099200.

The previous prime is 1388243. The next prime is 1388269. The reversal of 1388245 is 5428831.

It can be written as a sum of positive squares in 4 ways, for example, as 208849 + 1179396 = 457^2 + 1086^2 .

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

It is not a de Polignac number, because 1388245 - 2¹ = 1388243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388243) 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, 870 + ... + 1879.

It is an arithmetic number, because the mean of its divisors is an integer number (210375).

2^1388245 is an apocalyptic number.

It is an amenable number.

1388245 is a deficient number, since it is larger than the sum of its proper divisors (294755).

1388245 is a wasteful number, since it uses less digits than its factorization.

1388245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855.

The product of its digits is 7680, while the sum is 31.

The square root of 1388245 is about 1178.2380913890. The cubic root of 1388245 is about 111.5549140644.

The spelling of 1388245 in words is "one million, three hundred eighty-eight thousand, two hundred forty-five".