1553601 has 16 divisors (see below), whose sum is σ = 2386944. Its totient is φ = 880464.

The previous prime is 1553597. The next prime is 1553653. The reversal of 1553601 is 1063551.

It is a happy number.

It is not a de Polignac number, because 1553601 - 2² = 1553597 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1553401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3286 + ... + 3728.

It is an arithmetic number, because the mean of its divisors is an integer number (149184).

2^1553601 is an apocalyptic number.

It is an amenable number.

1553601 is a deficient number, since it is larger than the sum of its proper divisors (833343).

1553601 is a wasteful number, since it uses less digits than its factorization.

1553601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1553601 is about 1246.4353172147. The cubic root of 1553601 is about 115.8190052955.

The spelling of 1553601 in words is "one million, five hundred fifty-three thousand, six hundred one".