148257439 has 4 divisors (see below), whose sum is σ = 161735400. Its totient is φ = 134779480.

The previous prime is 148257401. The next prime is 148257449. The reversal of 148257439 is 934752841.

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

It is a de Polignac number, because none of the positive numbers 2^k-148257439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 148257395 and 148257404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148257449) 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, 6738964 + ... + 6738985.

It is an arithmetic number, because the mean of its divisors is an integer number (40433850).

Almost surely, 2^148257439 is an apocalyptic number.

148257439 is a deficient number, since it is larger than the sum of its proper divisors (13477961).

148257439 is a wasteful number, since it uses less digits than its factorization.

148257439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13477960.

The product of its digits is 241920, while the sum is 43.

The square root of 148257439 is about 12176.1011411699. The cubic root of 148257439 is about 529.2637683162.

The spelling of 148257439 in words is "one hundred forty-eight million, two hundred fifty-seven thousand, four hundred thirty-nine".