400001270 has 16 divisors (see below), whose sum is σ = 721016640. Its totient is φ = 159775104.

The previous prime is 400001269. The next prime is 400001341. The reversal of 400001270 is 72100004.

It is a happy number.

It is a super-2 number, since 2×400001270² = 320002032003225800, 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 7 ways as a sum of consecutive naturals, for example, 20627 + ... + 35006.

It is an arithmetic number, because the mean of its divisors is an integer number (45063540).

Almost surely, 2^400001270 is an apocalyptic number.

400001270 is a deficient number, since it is larger than the sum of its proper divisors (321015370).

400001270 is a wasteful number, since it uses less digits than its factorization.

400001270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56359.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 400001270 is about 20000.0317499748. The cubic root of 400001270 is about 736.8070795139.

Adding to 400001270 its reverse (72100004), we get a palindrome (472101274).

The spelling of 400001270 in words is "four hundred million, one thousand, two hundred seventy".