145231487 has 2 divisors, whose sum is σ = 145231488. Its totient is φ = 145231486.

The previous prime is 145231469. The next prime is 145231531. The reversal of 145231487 is 784132541.

145231487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145231487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145231087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72615743 + 72615744.

It is an arithmetic number, because the mean of its divisors is an integer number (72615744).

Almost surely, 2^145231487 is an apocalyptic number.

145231487 is a deficient number, since it is larger than the sum of its proper divisors (1).

145231487 is an equidigital number, since it uses as much as digits as its factorization.

145231487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The square root of 145231487 is about 12051.2027200608. The cubic root of 145231487 is about 525.6382103980.

The spelling of 145231487 in words is "one hundred forty-five million, two hundred thirty-one thousand, four hundred eighty-seven".