1553743 has 2 divisors, whose sum is σ = 1553744. Its totient is φ = 1553742.

The previous prime is 1553737. The next prime is 1553753. The reversal of 1553743 is 3473551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1553743 - 2⁵ = 1553711 is a prime.

It is equal to p₁₁₇₉₂₈ and since 1553743 and 117928 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1553723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776871 + 776872.

It is an arithmetic number, because the mean of its divisors is an integer number (776872).

2^1553743 is an apocalyptic number.

1553743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553743 is an equidigital number, since it uses as much as digits as its factorization.

1553743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 28.

The square root of 1553743 is about 1246.4922783555. The cubic root of 1553743 is about 115.8225338286.

The spelling of 1553743 in words is "one million, five hundred fifty-three thousand, seven hundred forty-three".