148744781 has 8 divisors (see below), whose sum is σ = 157857984. Its totient is φ = 139672000.

The previous prime is 148744777. The next prime is 148744793. The reversal of 148744781 is 187447841.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 148744781 - 2² = 148744777 is a prime.

It is a super-2 number, since 2×148744781² = 44250019749475922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148744751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2345 + ... + 17406.

It is an arithmetic number, because the mean of its divisors is an integer number (19732248).

Almost surely, 2^148744781 is an apocalyptic number.

It is an amenable number.

148744781 is a deficient number, since it is larger than the sum of its proper divisors (9113203).

148744781 is a wasteful number, since it uses less digits than its factorization.

148744781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20211.

The product of its digits is 200704, while the sum is 44.

The square root of 148744781 is about 12196.0969576336. The cubic root of 148744781 is about 529.8430542768.

The spelling of 148744781 in words is "one hundred forty-eight million, seven hundred forty-four thousand, seven hundred eighty-one".