145721167 has 2 divisors, whose sum is σ = 145721168. Its totient is φ = 145721166.

The previous prime is 145721129. The next prime is 145721171. The reversal of 145721167 is 761127541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145721167 - 2¹⁵ = 145688399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145721117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72860583 + 72860584.

It is an arithmetic number, because the mean of its divisors is an integer number (72860584).

Almost surely, 2^145721167 is an apocalyptic number.

145721167 is a deficient number, since it is larger than the sum of its proper divisors (1).

145721167 is an equidigital number, since it uses as much as digits as its factorization.

145721167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 145721167 is about 12071.5022677378. The cubic root of 145721167 is about 526.2283160686.

The spelling of 145721167 in words is "one hundred forty-five million, seven hundred twenty-one thousand, one hundred sixty-seven".