1501605 has 48 divisors (see below), whose sum is σ = 3119040. Its totient is φ = 683424.

The previous prime is 1501597. The next prime is 1501607. The reversal of 1501605 is 5061051.

It is not a de Polignac number, because 1501605 - 2³ = 1501597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1501607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6502 + ... + 6728.

It is an arithmetic number, because the mean of its divisors is an integer number (64980).

2^1501605 is an apocalyptic number.

1501605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1501605 is an abundant number, since it is smaller than the sum of its proper divisors (1617435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1501605 is a wasteful number, since it uses less digits than its factorization.

1501605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1501605 is about 1225.3999347152. The cubic root of 1501605 is about 114.5122378433.

Adding to 1501605 its reverse (5061051), we get a palindrome (6562656).

The spelling of 1501605 in words is "one million, five hundred one thousand, six hundred five".