1554961 has 4 divisors (see below), whose sum is σ = 1622592. Its totient is φ = 1487332.

The previous prime is 1554913. The next prime is 1554977. The reversal of 1554961 is 1694551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1554961 - 2¹¹ = 1552913 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1554461) 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, 33781 + ... + 33826.

It is an arithmetic number, because the mean of its divisors is an integer number (405648).

2^1554961 is an apocalyptic number.

It is an amenable number.

1554961 is a deficient number, since it is larger than the sum of its proper divisors (67631).

1554961 is an equidigital number, since it uses as much as digits as its factorization.

1554961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67630.

The product of its digits is 5400, while the sum is 31.

The square root of 1554961 is about 1246.9807536606. The cubic root of 1554961 is about 115.8527908702.

The spelling of 1554961 in words is "one million, five hundred fifty-four thousand, nine hundred sixty-one".