45142121 has 8 divisors (see below), whose sum is σ = 46066464. Its totient is φ = 44225280.

The previous prime is 45142117. The next prime is 45142127. The reversal of 45142121 is 12124154.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 45142121 - 2² = 45142117 is a prime.

It is a super-2 number, since 2×45142121² = 4075622176757282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45142093 and 45142102.

It is not an unprimeable number, because it can be changed into a prime (45142127) 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 7 ways as a sum of consecutive naturals, for example, 11186 + ... + 14676.

It is an arithmetic number, because the mean of its divisors is an integer number (5758308).

Almost surely, 2^45142121 is an apocalyptic number.

It is an amenable number.

45142121 is a deficient number, since it is larger than the sum of its proper divisors (924343).

45142121 is a wasteful number, since it uses less digits than its factorization.

45142121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751.

The product of its digits is 320, while the sum is 20.

The square root of 45142121 is about 6718.7886557028. The cubic root of 45142121 is about 356.0633882203.

Adding to 45142121 its reverse (12124154), we get a palindrome (57266275).

The spelling of 45142121 in words is "forty-five million, one hundred forty-two thousand, one hundred twenty-one".