1542120223 has 16 divisors (see below), whose sum is σ = 1820955136. Its totient is φ = 1278516960.

The previous prime is 1542120221. The next prime is 1542120247. The reversal of 1542120223 is 3220212451.

It is a happy number.

It is not a de Polignac number, because 1542120223 - 2¹ = 1542120221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1542120194 and 1542120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542120221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6133 + ... + 55873.

It is an arithmetic number, because the mean of its divisors is an integer number (113809696).

Almost surely, 2^1542120223 is an apocalyptic number.

1542120223 is a deficient number, since it is larger than the sum of its proper divisors (278834913).

1542120223 is a wasteful number, since it uses less digits than its factorization.

1542120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49894.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1542120223 is about 39269.8385914686. The cubic root of 1542120223 is about 1155.3300713910.

Adding to 1542120223 its reverse (3220212451), we get a palindrome (4762332674).

The spelling of 1542120223 in words is "one billion, five hundred forty-two million, one hundred twenty thousand, two hundred twenty-three".