1553725 has 12 divisors (see below), whose sum is σ = 2028640. Its totient is φ = 1177200.

The previous prime is 1553723. The next prime is 1553729. The reversal of 1553725 is 5273551.

It is not a de Polignac number, because 1553725 - 2¹ = 1553723 is a prime.

It is a super-2 number, since 2×1553725² = 4828122751250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1553693 and 1553702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161 + ... + 2110.

2^1553725 is an apocalyptic number.

It is an amenable number.

1553725 is a deficient number, since it is larger than the sum of its proper divisors (474915).

1553725 is a wasteful number, since it uses less digits than its factorization.

1553725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300 (or 3295 counting only the distinct ones).

The product of its digits is 5250, while the sum is 28.

The square root of 1553725 is about 1246.4850580733. The cubic root of 1553725 is about 115.8220865617.

It can be divided in two parts, 1553 and 725, that added together give a triangular number (2278 = T₆₇).

The spelling of 1553725 in words is "one million, five hundred fifty-three thousand, seven hundred twenty-five".