1554542401 has 4 divisors (see below), whose sum is σ = 1557416404. Its totient is φ = 1551668400.

The previous prime is 1554542369. The next prime is 1554542411. The reversal of 1554542401 is 1042454551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1042454551 = 19 ⋅54866029.

It can be written as a sum of positive squares in 2 ways, for example, as 263218176 + 1291324225 = 16224^2 + 35935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554542401 - 2⁵ = 1554542369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1554542411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436190 + ... + 1437271.

It is an arithmetic number, because the mean of its divisors is an integer number (389354101).

Almost surely, 2^1554542401 is an apocalyptic number.

It is an amenable number.

1554542401 is a deficient number, since it is larger than the sum of its proper divisors (2874003).

1554542401 is an equidigital number, since it uses as much as digits as its factorization.

1554542401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874002.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 1554542401 is about 39427.6857170187. The cubic root of 1554542401 is about 1158.4239399315.

Adding to 1554542401 its reverse (1042454551), we get a palindrome (2596996952).

The spelling of 1554542401 in words is "one billion, five hundred fifty-four million, five hundred forty-two thousand, four hundred one".