145015477 has 2 divisors, whose sum is σ = 145015478. Its totient is φ = 145015476.

The previous prime is 145015471. The next prime is 145015511. The reversal of 145015477 is 774510541.

It is an a-pointer prime, because the next prime (145015511) can be obtained adding 145015477 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75359761 + 69655716 = 8681^2 + 8346^2 .

It is a cyclic number.

It is not a de Polignac number, because 145015477 - 2¹⁵ = 144982709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145015471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72507738 + 72507739.

It is an arithmetic number, because the mean of its divisors is an integer number (72507739).

Almost surely, 2^145015477 is an apocalyptic number.

It is an amenable number.

145015477 is a deficient number, since it is larger than the sum of its proper divisors (1).

145015477 is an equidigital number, since it uses as much as digits as its factorization.

145015477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 145015477 is about 12042.2372090903. The cubic root of 145015477 is about 525.3774784876.

It can be divided in two parts, 1450 and 15477, that multiplied together give a triangular number (22441650 = T₆₆₉₉).

The spelling of 145015477 in words is "one hundred forty-five million, fifteen thousand, four hundred seventy-seven".