145215123 has 8 divisors (see below), whose sum is σ = 202038528. Its totient is φ = 92600904.

The previous prime is 145215113. The next prime is 145215137. The reversal of 145215123 is 321512541.

It is a happy number.

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

It is not a de Polignac number, because 145215123 - 2¹³ = 145206931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145215093 and 145215102.

It is not an unprimeable number, because it can be changed into a prime (145215113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052215 + ... + 1052352.

It is an arithmetic number, because the mean of its divisors is an integer number (25254816).

Almost surely, 2^145215123 is an apocalyptic number.

145215123 is a deficient number, since it is larger than the sum of its proper divisors (56823405).

145215123 is a wasteful number, since it uses less digits than its factorization.

145215123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104593.

The product of its digits is 1200, while the sum is 24.

The square root of 145215123 is about 12050.5237645507. The cubic root of 145215123 is about 525.6184675104.

Adding to 145215123 its reverse (321512541), we get a palindrome (466727664).

It can be divided in two parts, 1452 and 15123, that multiplied together give a square (21958596 = 4686²).

The spelling of 145215123 in words is "one hundred forty-five million, two hundred fifteen thousand, one hundred twenty-three".