143402445 has 24 divisors (see below), whose sum is σ = 252279456. Its totient is φ = 75338208.

The previous prime is 143402437. The next prime is 143402473. The reversal of 143402445 is 544204341.

It is a happy number.

It is not a de Polignac number, because 143402445 - 2³ = 143402437 is a prime.

It is a super-2 number, since 2×143402445² = 41128522463956050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20767 + ... + 26796.

It is an arithmetic number, because the mean of its divisors is an integer number (10511644).

Almost surely, 2^143402445 is an apocalyptic number.

143402445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

143402445 is a deficient number, since it is larger than the sum of its proper divisors (108877011).

143402445 is a wasteful number, since it uses less digits than its factorization.

143402445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47641 (or 47638 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 143402445 is about 11975.0759914082. The cubic root of 143402445 is about 523.4222564715.

Adding to 143402445 its reverse (544204341), we get a palindrome (687606786).

The spelling of 143402445 in words is "one hundred forty-three million, four hundred two thousand, four hundred forty-five".