402145401 has 12 divisors (see below), whose sum is σ = 623735952. Its totient is φ = 229797288.

The previous prime is 402145379. The next prime is 402145439. The reversal of 402145401 is 104541204.

It is a happy number.

It is not a de Polignac number, because 402145401 - 2¹⁰ = 402144377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (402145441) 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, 1367695 + ... + 1367988.

It is an arithmetic number, because the mean of its divisors is an integer number (51977996).

Almost surely, 2^402145401 is an apocalyptic number.

It is an amenable number.

402145401 is a deficient number, since it is larger than the sum of its proper divisors (221590551).

402145401 is a wasteful number, since it uses less digits than its factorization.

402145401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735700 (or 2735693 counting only the distinct ones).

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

The square root of 402145401 is about 20053.5632993241. The cubic root of 402145401 is about 738.1212391059.

Adding to 402145401 its reverse (104541204), we get a palindrome (506686605).

The spelling of 402145401 in words is "four hundred two million, one hundred forty-five thousand, four hundred one".