145861637 has 2 divisors, whose sum is σ = 145861638. Its totient is φ = 145861636.

The previous prime is 145861601. The next prime is 145861657. The reversal of 145861637 is 736168541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138321121 + 7540516 = 11761^2 + 2746^2 .

It is a cyclic number.

It is not a de Polignac number, because 145861637 - 2¹⁴ = 145845253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145861594 and 145861603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145861657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72930818 + 72930819.

It is an arithmetic number, because the mean of its divisors is an integer number (72930819).

Almost surely, 2^145861637 is an apocalyptic number.

It is an amenable number.

145861637 is a deficient number, since it is larger than the sum of its proper divisors (1).

145861637 is an equidigital number, since it uses as much as digits as its factorization.

145861637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 145861637 is about 12077.3191147705. The cubic root of 145861637 is about 526.3973501994.

The spelling of 145861637 in words is "one hundred forty-five million, eight hundred sixty-one thousand, six hundred thirty-seven".