1545420121 has 8 divisors (see below), whose sum is σ = 1827097920. Its totient is φ = 1278968208.

The previous prime is 1545420101. The next prime is 1545420131. The reversal of 1545420121 is 1210245451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1545420121 - 2¹¹ = 1545418073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1545420101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3806251 + ... + 3806656.

It is an arithmetic number, because the mean of its divisors is an integer number (228387240).

Almost surely, 2^1545420121 is an apocalyptic number.

It is an amenable number.

1545420121 is a deficient number, since it is larger than the sum of its proper divisors (281677799).

1545420121 is an equidigital number, since it uses as much as digits as its factorization.

1545420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612943.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1545420121 is about 39311.8318194408. The cubic root of 1545420121 is about 1156.1535599876.

Adding to 1545420121 its reverse (1210245451), we get a palindrome (2755665572).

The spelling of 1545420121 in words is "one billion, five hundred forty-five million, four hundred twenty thousand, one hundred twenty-one".