402142145 has 8 divisors (see below), whose sum is σ = 494340840. Its totient is φ = 313866880.

The previous prime is 402142127. The next prime is 402142183. The reversal of 402142145 is 541241204.

It can be written as a sum of positive squares in 4 ways, for example, as 1181569 + 400960576 = 1087^2 + 20024^2 .

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

It is not a de Polignac number, because 402142145 - 2²⁰ = 401093569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402142145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980630 + ... + 981039.

It is an arithmetic number, because the mean of its divisors is an integer number (61792605).

Almost surely, 2^402142145 is an apocalyptic number.

It is an amenable number.

402142145 is a deficient number, since it is larger than the sum of its proper divisors (92198695).

402142145 is a wasteful number, since it uses less digits than its factorization.

402142145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961715.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 402142145 is about 20053.4821165802. The cubic root of 402142145 is about 738.1192470161.

Adding to 402142145 its reverse (541241204), we get a palindrome (943383349).

The spelling of 402142145 in words is "four hundred two million, one hundred forty-two thousand, one hundred forty-five".