145657415 has 4 divisors (see below), whose sum is σ = 174788904. Its totient is φ = 116525928.

The previous prime is 145657399. The next prime is 145657417. The reversal of 145657415 is 514756541.

145657415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 514756541 = 13 ⋅39596657.

It is a cyclic number.

It is not a de Polignac number, because 145657415 - 2⁴ = 145657399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145657417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14565737 + ... + 14565746.

It is an arithmetic number, because the mean of its divisors is an integer number (43697226).

Almost surely, 2^145657415 is an apocalyptic number.

145657415 is a deficient number, since it is larger than the sum of its proper divisors (29131489).

145657415 is an equidigital number, since it uses as much as digits as its factorization.

145657415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29131488.

The product of its digits is 84000, while the sum is 38.

The square root of 145657415 is about 12068.8613796000. The cubic root of 145657415 is about 526.1515644617.

The spelling of 145657415 in words is "one hundred forty-five million, six hundred fifty-seven thousand, four hundred fifteen".