401011601 has 4 divisors (see below), whose sum is σ = 418446912. Its totient is φ = 383576292.

The previous prime is 401011577. The next prime is 401011603. The reversal of 401011601 is 106110104.

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 a de Polignac number, because none of the positive numbers 2^k-401011601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401011603) 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, 8717621 + ... + 8717666.

It is an arithmetic number, because the mean of its divisors is an integer number (104611728).

Almost surely, 2^401011601 is an apocalyptic number.

It is an amenable number.

401011601 is a deficient number, since it is larger than the sum of its proper divisors (17435311).

401011601 is a wasteful number, since it uses less digits than its factorization.

401011601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435310.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 401011601 is about 20025.2740555529. The cubic root of 401011601 is about 737.4269051755.

Adding to 401011601 its reverse (106110104), we get a palindrome (507121705).

The spelling of 401011601 in words is "four hundred one million, eleven thousand, six hundred one".