143574749 has 4 divisors (see below), whose sum is σ = 144845436. Its totient is φ = 142304064.

The previous prime is 143574731. The next prime is 143574757. The reversal of 143574749 is 947475341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947475341 = 67 ⋅14141423.

It can be written as a sum of positive squares in 2 ways, for example, as 51222649 + 92352100 = 7157^2 + 9610^2 .

It is a de Polignac number, because none of the positive numbers 2^k-143574749 is a prime.

It is a super-2 number, since 2×143574749² = 41227417100826002, 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 (143574779) 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, 635174 + ... + 635399.

It is an arithmetic number, because the mean of its divisors is an integer number (36211359).

Almost surely, 2^143574749 is an apocalyptic number.

It is an amenable number.

143574749 is a deficient number, since it is larger than the sum of its proper divisors (1270687).

143574749 is a wasteful number, since it uses less digits than its factorization.

143574749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270686.

The product of its digits is 423360, while the sum is 44.

The square root of 143574749 is about 11982.2681074995. The cubic root of 143574749 is about 523.6318104326.

The spelling of 143574749 in words is "one hundred forty-three million, five hundred seventy-four thousand, seven hundred forty-nine".