145321415 has 16 divisors (see below), whose sum is σ = 178606080. Its totient is φ = 113458080.

The previous prime is 145321403. The next prime is 145321427. The reversal of 145321415 is 514123541.

It is an interprime number because it is at equal distance from previous prime (145321403) and next prime (145321427).

It is not a de Polignac number, because 145321415 - 2⁸ = 145321159 is a prime.

It is a super-2 number, since 2×145321415² = 42236627315204450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111920 + ... + 113210.

It is an arithmetic number, because the mean of its divisors is an integer number (11162880).

Almost surely, 2^145321415 is an apocalyptic number.

145321415 is a deficient number, since it is larger than the sum of its proper divisors (33284665).

145321415 is a wasteful number, since it uses less digits than its factorization.

145321415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822.

The product of its digits is 2400, while the sum is 26.

The square root of 145321415 is about 12054.9332225442. The cubic root of 145321415 is about 525.7466805395.

Adding to 145321415 its reverse (514123541), we get a palindrome (659444956).

The spelling of 145321415 in words is "one hundred forty-five million, three hundred twenty-one thousand, four hundred fifteen".