1554481 has 4 divisors (see below), whose sum is σ = 1596532. Its totient is φ = 1512432.

The previous prime is 1554461. The next prime is 1554521. The reversal of 1554481 is 1844551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1844551 = 17 ⋅108503.

It can be written as a sum of positive squares in 2 ways, for example, as 1288225 + 266256 = 1135^2 + 516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1554481 is a prime.

It is a super-2 number, since 2×1554481² = 4832822358722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1554401) 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 3 ways as a sum of consecutive naturals, for example, 20970 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (399133).

2^1554481 is an apocalyptic number.

It is an amenable number.

1554481 is a deficient number, since it is larger than the sum of its proper divisors (42051).

1554481 is an equidigital number, since it uses as much as digits as its factorization.

1554481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42050.

The product of its digits is 3200, while the sum is 28.

The square root of 1554481 is about 1246.7882739263. The cubic root of 1554481 is about 115.8408688000.

It can be divided in two parts, 15544 and 81, that added together give a 6-th power (15625 = 5⁶).

The spelling of 1554481 in words is "one million, five hundred fifty-four thousand, four hundred eighty-one".