1552404 has 24 divisors (see below), whose sum is σ = 4139968. Its totient is φ = 443520.

The previous prime is 1552403. The next prime is 1552417. The reversal of 1552404 is 4042551.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552403) 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, 9157 + ... + 9324.

2^1552404 is an apocalyptic number.

1552404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1552404 is an abundant number, since it is smaller than the sum of its proper divisors (2587564).

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

1552404 is a wasteful number, since it uses less digits than its factorization.

1552404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495 (or 18493 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1552404 is about 1245.9550553692. The cubic root of 1552404 is about 115.7892527037.

Adding to 1552404 its reverse (4042551), we get a palindrome (5594955).

The spelling of 1552404 in words is "one million, five hundred fifty-two thousand, four hundred four".