145212415 has 4 divisors (see below), whose sum is σ = 174254904. Its totient is φ = 116169928.

The previous prime is 145212373. The next prime is 145212427. The reversal of 145212415 is 514212541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145212415 - 2¹¹ = 145210367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145212415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14521237 + ... + 14521246.

It is an arithmetic number, because the mean of its divisors is an integer number (43563726).

Almost surely, 2^145212415 is an apocalyptic number.

145212415 is a deficient number, since it is larger than the sum of its proper divisors (29042489).

145212415 is an equidigital number, since it uses as much as digits as its factorization.

145212415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29042488.

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

The square root of 145212415 is about 12050.4114037654. The cubic root of 145212415 is about 525.6152002115.

Adding to 145212415 its reverse (514212541), we get a palindrome (659424956).

The spelling of 145212415 in words is "one hundred forty-five million, two hundred twelve thousand, four hundred fifteen".