145151971 has 2 divisors, whose sum is σ = 145151972. Its totient is φ = 145151970.

The previous prime is 145151953. The next prime is 145151987. The reversal of 145151971 is 179151541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145151971 - 2⁵ = 145151939 is a prime.

It is not a weakly prime, because it can be changed into another prime (145151771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72575985 + 72575986.

It is an arithmetic number, because the mean of its divisors is an integer number (72575986).

Almost surely, 2^145151971 is an apocalyptic number.

145151971 is a deficient number, since it is larger than the sum of its proper divisors (1).

145151971 is an equidigital number, since it uses as much as digits as its factorization.

145151971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 34.

The square root of 145151971 is about 12047.9031785618. The cubic root of 145151971 is about 525.5422617871.

The spelling of 145151971 in words is "one hundred forty-five million, one hundred fifty-one thousand, nine hundred seventy-one".