1522404 has 36 divisors (see below), whose sum is σ = 4145596. Its totient is φ = 468288.

The previous prime is 1522399. The next prime is 1522427. The reversal of 1522404 is 4042251.

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 518400 = 1002^2 + 720^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1159 + ... + 2094.

2^1522404 is an apocalyptic number.

It is an amenable number.

1522404 is an abundant number, since it is smaller than the sum of its proper divisors (2623192).

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

1522404 is a wasteful number, since it uses less digits than its factorization.

1522404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276 (or 3271 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1522404 is about 1233.8573661489. The cubic root of 1522404 is about 115.0385252148.

Adding to 1522404 its reverse (4042251), we get a palindrome (5564655).

It can be divided in two parts, 152 and 2404, that added together give a triangular number (2556 = T₇₁).

The spelling of 1522404 in words is "one million, five hundred twenty-two thousand, four hundred four".