400001371 has 16 divisors (see below), whose sum is σ = 510870528. Its totient is φ = 304084800.

The previous prime is 400001369. The next prime is 400001387. The reversal of 400001371 is 173100004.

It is a cyclic number.

It is not a de Polignac number, because 400001371 - 2¹ = 400001369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400001341) 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, 60195 + ... + 66508.

It is an arithmetic number, because the mean of its divisors is an integer number (31929408).

Almost surely, 2^400001371 is an apocalyptic number.

400001371 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

400001371 is a deficient number, since it is larger than the sum of its proper divisors (110869157).

400001371 is a wasteful number, since it uses less digits than its factorization.

400001371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126762.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 400001371 is about 20000.0342749706. The cubic root of 400001371 is about 736.8071415283.

Adding to 400001371 its reverse (173100004), we get a palindrome (573101375).

The spelling of 400001371 in words is "four hundred million, one thousand, three hundred seventy-one".