148461491 has 4 divisors (see below), whose sum is σ = 148486800. Its totient is φ = 148436184.

The previous prime is 148461473. The next prime is 148461503. The reversal of 148461491 is 194164841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194164841 = 13 ⋅14935757.

It is a cyclic number.

It is not a de Polignac number, because 148461491 - 2¹⁸ = 148199347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148461431) 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, 1205 + ... + 17273.

It is an arithmetic number, because the mean of its divisors is an integer number (37121700).

Almost surely, 2^148461491 is an apocalyptic number.

148461491 is a deficient number, since it is larger than the sum of its proper divisors (25309).

148461491 is an equidigital number, since it uses as much as digits as its factorization.

148461491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25308.

The product of its digits is 27648, while the sum is 38.

The square root of 148461491 is about 12184.4774610978. The cubic root of 148461491 is about 529.5064718689.

The spelling of 148461491 in words is "one hundred forty-eight million, four hundred sixty-one thousand, four hundred ninety-one".