401100642 has 12 divisors (see below), whose sum is σ = 869051430. Its totient is φ = 133700208.

The previous prime is 401100641. The next prime is 401100649. The reversal of 401100642 is 246001104.

It can be written as a sum of positive squares in only one way, i.e., 364848201 + 36252441 = 19101^2 + 6021^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22283369 = 401100642 / (4 + 0 + 1 + 1 + 0 + 0 + 6 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (401100641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11141667 + ... + 11141702.

Almost surely, 2^401100642 is an apocalyptic number.

401100642 is an abundant number, since it is smaller than the sum of its proper divisors (467950788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401100642 is a wasteful number, since it uses less digits than its factorization.

401100642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22283377 (or 22283374 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 401100642 is about 20027.4971476717. The cubic root of 401100642 is about 737.4814807951.

Adding to 401100642 its reverse (246001104), we get a palindrome (647101746).

The spelling of 401100642 in words is "four hundred one million, one hundred thousand, six hundred forty-two".