158420247 has 4 divisors (see below), whose sum is σ = 211227000. Its totient is φ = 105613496.

The previous prime is 158420219. The next prime is 158420257. The reversal of 158420247 is 742024851.

158420247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158420247 - 2⁶ = 158420183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158420257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26403372 + ... + 26403377.

It is an arithmetic number, because the mean of its divisors is an integer number (52806750).

Almost surely, 2^158420247 is an apocalyptic number.

158420247 is a deficient number, since it is larger than the sum of its proper divisors (52806753).

158420247 is an equidigital number, since it uses as much as digits as its factorization.

158420247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52806752.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 158420247 is about 12586.5105172164. The cubic root of 158420247 is about 541.0908982695.

The spelling of 158420247 in words is "one hundred fifty-eight million, four hundred twenty thousand, two hundred forty-seven".