143249481 has 12 divisors (see below), whose sum is σ = 213591040. Its totient is φ = 92418840.

The previous prime is 143249479. The next prime is 143249489. The reversal of 143249481 is 184942341.

It is a happy number.

It is not a de Polignac number, because 143249481 - 2¹ = 143249479 is a prime.

It is a super-2 number, since 2×143249481² = 41040827613538722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143249489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256441 + ... + 256998.

Almost surely, 2^143249481 is an apocalyptic number.

It is an amenable number.

143249481 is a deficient number, since it is larger than the sum of its proper divisors (70341559).

143249481 is a wasteful number, since it uses less digits than its factorization.

143249481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513476 (or 513473 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 143249481 is about 11968.6875220301. The cubic root of 143249481 is about 523.2360828753.

The spelling of 143249481 in words is "one hundred forty-three million, two hundred forty-nine thousand, four hundred eighty-one".