400248001 has 4 divisors (see below), whose sum is σ = 417650112. Its totient is φ = 382845892.

The previous prime is 400247987. The next prime is 400248011. The reversal of 400248001 is 100842004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400248001 - 2¹¹ = 400245953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400248001.

It is not an unprimeable number, because it can be changed into a prime (400248011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8701021 + ... + 8701066.

It is an arithmetic number, because the mean of its divisors is an integer number (104412528).

Almost surely, 2^400248001 is an apocalyptic number.

It is an amenable number.

400248001 is a deficient number, since it is larger than the sum of its proper divisors (17402111).

400248001 is a wasteful number, since it uses less digits than its factorization.

400248001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17402110.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 400248001 is about 20006.1990642900. The cubic root of 400248001 is about 736.9585421848.

It can be divided in two parts, 4002 and 48001, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 400248001 in words is "four hundred million, two hundred forty-eight thousand, one".