402140145 has 16 divisors (see below), whose sum is σ = 701917632. Its totient is φ = 194976960.

The previous prime is 402140143. The next prime is 402140173. The reversal of 402140145 is 541041204.

It is a happy number.

It is not a de Polignac number, because 402140145 - 2¹ = 402140143 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402140143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218442 + ... + 1218771.

It is an arithmetic number, because the mean of its divisors is an integer number (43869852).

Almost surely, 2^402140145 is an apocalyptic number.

It is an amenable number.

402140145 is a deficient number, since it is larger than the sum of its proper divisors (299777487).

402140145 is a wasteful number, since it uses less digits than its factorization.

402140145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437232.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 402140145 is about 20053.4322498669. The cubic root of 402140145 is about 738.1180233684.

Adding to 402140145 its reverse (541041204), we get a palindrome (943181349).

The spelling of 402140145 in words is "four hundred two million, one hundred forty thousand, one hundred forty-five".