1630542121 has 16 divisors (see below), whose sum is σ = 1771862400. Its totient is φ = 1491557760.

The previous prime is 1630542119. The next prime is 1630542149. The reversal of 1630542121 is 1212450361.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1630542121 - 2¹ = 1630542119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630542181) 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 15 ways as a sum of consecutive naturals, for example, 725826 + ... + 728068.

It is an arithmetic number, because the mean of its divisors is an integer number (110741400).

Almost surely, 2^1630542121 is an apocalyptic number.

It is an amenable number.

1630542121 is a deficient number, since it is larger than the sum of its proper divisors (141320279).

1630542121 is a wasteful number, since it uses less digits than its factorization.

1630542121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1630542121 is about 40379.9717805746. The cubic root of 1630542121 is about 1177.0023792134.

Adding to 1630542121 its reverse (1212450361), we get a palindrome (2842992482).

The spelling of 1630542121 in words is "one billion, six hundred thirty million, five hundred forty-two thousand, one hundred twenty-one".