158423261 has 2 divisors, whose sum is σ = 158423262. Its totient is φ = 158423260.

The previous prime is 158423219. The next prime is 158423267. The reversal of 158423261 is 162324851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146555236 + 11868025 = 12106^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 158423261 - 2¹⁸ = 158161117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158423267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79211630 + 79211631.

It is an arithmetic number, because the mean of its divisors is an integer number (79211631).

Almost surely, 2^158423261 is an apocalyptic number.

It is an amenable number.

158423261 is a deficient number, since it is larger than the sum of its proper divisors (1).

158423261 is an equidigital number, since it uses as much as digits as its factorization.

158423261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 158423261 is about 12586.6302480052. The cubic root of 158423261 is about 541.0943297282.

The spelling of 158423261 in words is "one hundred fifty-eight million, four hundred twenty-three thousand, two hundred sixty-one".