145431287 has 2 divisors, whose sum is σ = 145431288. Its totient is φ = 145431286.

The previous prime is 145431281. The next prime is 145431329. The reversal of 145431287 is 782134541.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145431287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145431281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72715643 + 72715644.

It is an arithmetic number, because the mean of its divisors is an integer number (72715644).

Almost surely, 2^145431287 is an apocalyptic number.

145431287 is a deficient number, since it is larger than the sum of its proper divisors (1).

145431287 is an equidigital number, since it uses as much as digits as its factorization.

145431287 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 145431287 is about 12059.4894999747. The cubic root of 145431287 is about 525.8791461903.

The spelling of 145431287 in words is "one hundred forty-five million, four hundred thirty-one thousand, two hundred eighty-seven".