401782001 has 16 divisors (see below), whose sum is σ = 427932288. Its totient is φ = 376675200.

The previous prime is 401781983. The next prime is 401782013. The reversal of 401782001 is 100287104.

It is a de Polignac number, because none of the positive numbers 2^k-401782001 is a prime.

It is a super-2 number, since 2×401782001² = 322857552655128002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401782081) 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, 124316 + ... + 127506.

It is an arithmetic number, because the mean of its divisors is an integer number (26745768).

Almost surely, 2^401782001 is an apocalyptic number.

401782001 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

401782001 is a deficient number, since it is larger than the sum of its proper divisors (26150287).

401782001 is a wasteful number, since it uses less digits than its factorization.

401782001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 401782001 is about 20044.5005175983. The cubic root of 401782001 is about 737.8988368812.

The spelling of 401782001 in words is "four hundred one million, seven hundred eighty-two thousand, one".