145214681 has 2 divisors, whose sum is σ = 145214682. Its totient is φ = 145214680.

The previous prime is 145214659. The next prime is 145214689. The reversal of 145214681 is 186412541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140304025 + 4910656 = 11845^2 + 2216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145214681 is a prime.

It is a super-2 number, since 2×145214681² = 42174607155863522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145214689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72607340 + 72607341.

It is an arithmetic number, because the mean of its divisors is an integer number (72607341).

Almost surely, 2^145214681 is an apocalyptic number.

It is an amenable number.

145214681 is a deficient number, since it is larger than the sum of its proper divisors (1).

145214681 is an equidigital number, since it uses as much as digits as its factorization.

145214681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 145214681 is about 12050.5054250849. The cubic root of 145214681 is about 525.6179342244.

The spelling of 145214681 in words is "one hundred forty-five million, two hundred fourteen thousand, six hundred eighty-one".