158261505 has 16 divisors (see below), whose sum is σ = 264228480. Its totient is φ = 80736128.

The previous prime is 158261501. The next prime is 158261527. The reversal of 158261505 is 505162851.

It is a cyclic number.

It is not a de Polignac number, because 158261505 - 2² = 158261501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158261501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229020 + ... + 229709.

It is an arithmetic number, because the mean of its divisors is an integer number (16514280).

Almost surely, 2^158261505 is an apocalyptic number.

158261505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158261505 is a deficient number, since it is larger than the sum of its proper divisors (105966975).

158261505 is a wasteful number, since it uses less digits than its factorization.

158261505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458760.

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 158261505 is about 12580.2028997946. The cubic root of 158261505 is about 540.9101079172.

It can be divided in two parts, 158261 and 505, that added together give a triangular number (158766 = T₅₆₃).

The spelling of 158261505 in words is "one hundred fifty-eight million, two hundred sixty-one thousand, five hundred five".