1390915 has 8 divisors (see below), whose sum is σ = 1681200. Its totient is φ = 1104672.

The previous prime is 1390913. The next prime is 1390919. The reversal of 1390915 is 5190931.

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 1390915 - 2¹ = 1390913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1390913) 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, 189 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (210150).

2^1390915 is an apocalyptic number.

1390915 is a deficient number, since it is larger than the sum of its proper divisors (290285).

1390915 is a wasteful number, since it uses less digits than its factorization.

1390915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 1390915 is about 1179.3705948513. The cubic root of 1390915 is about 111.6263858081.

It can be divided in two parts, 13909 and 15, that added together give a square (13924 = 118²).

The spelling of 1390915 in words is "one million, three hundred ninety thousand, nine hundred fifteen".