1553045 has 8 divisors (see below), whose sum is σ = 2007096. Its totient is φ = 1146816.

The previous prime is 1553023. The next prime is 1553053. The reversal of 1553045 is 5403551.

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 1343281 = 458^2 + 1159^2 .

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 1553045 - 2⁶ = 1552981 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11882 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (250887).

2^1553045 is an apocalyptic number.

It is an amenable number.

1553045 is a deficient number, since it is larger than the sum of its proper divisors (454051).

1553045 is a wasteful number, since it uses less digits than its factorization.

1553045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23911.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 1553045 is about 1246.2122612140. The cubic root of 1553045 is about 115.8051872795.

Adding to 1553045 its reverse (5403551), we get a palindrome (6956596).

The spelling of 1553045 in words is "one million, five hundred fifty-three thousand, forty-five".