145542101 has 2 divisors, whose sum is σ = 145542102. Its totient is φ = 145542100.

The previous prime is 145542073. The next prime is 145542139. The reversal of 145542101 is 101245541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116100625 + 29441476 = 10775^2 + 5426^2 .

It is a cyclic number.

It is not a de Polignac number, because 145542101 - 2¹⁸ = 145279957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145542301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72771050 + 72771051.

It is an arithmetic number, because the mean of its divisors is an integer number (72771051).

Almost surely, 2^145542101 is an apocalyptic number.

It is an amenable number.

145542101 is a deficient number, since it is larger than the sum of its proper divisors (1).

145542101 is an equidigital number, since it uses as much as digits as its factorization.

145542101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 145542101 is about 12064.0830981886. The cubic root of 145542101 is about 526.0126799895.

Adding to 145542101 its reverse (101245541), we get a palindrome (246787642).

The spelling of 145542101 in words is "one hundred forty-five million, five hundred forty-two thousand, one hundred one".