145711481 has 2 divisors, whose sum is σ = 145711482. Its totient is φ = 145711480.

The previous prime is 145711459. The next prime is 145711483. The reversal of 145711481 is 184117541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107827456 + 37884025 = 10384^2 + 6155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145711481 is a prime.

It is a super-2 number, since 2×145711481² = 42463671390426722, which contains 22 as substring.

Together with 145711483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145711483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72855740 + 72855741.

It is an arithmetic number, because the mean of its divisors is an integer number (72855741).

Almost surely, 2^145711481 is an apocalyptic number.

It is an amenable number.

145711481 is a deficient number, since it is larger than the sum of its proper divisors (1).

145711481 is an equidigital number, since it uses as much as digits as its factorization.

145711481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 32.

The square root of 145711481 is about 12071.1010682539. The cubic root of 145711481 is about 526.2166564483.

The spelling of 145711481 in words is "one hundred forty-five million, seven hundred eleven thousand, four hundred eighty-one".