401520701 has 4 divisors (see below), whose sum is σ = 403187004. Its totient is φ = 399854400.

The previous prime is 401520697. The next prime is 401520703. The reversal of 401520701 is 107025104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186868900 + 214651801 = 13670^2 + 14651^2 .

It is a cyclic number.

It is not a de Polignac number, because 401520701 - 2² = 401520697 is a prime.

It is a super-2 number, since 2×401520701² = 322437746663062802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401520703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832790 + ... + 833271.

It is an arithmetic number, because the mean of its divisors is an integer number (100796751).

Almost surely, 2^401520701 is an apocalyptic number.

It is an amenable number.

401520701 is a deficient number, since it is larger than the sum of its proper divisors (1666303).

401520701 is a wasteful number, since it uses less digits than its factorization.

401520701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666302.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 401520701 is about 20037.9814602170. The cubic root of 401520701 is about 737.7388373628.

Adding to 401520701 its reverse (107025104), we get a palindrome (508545805).

The spelling of 401520701 in words is "four hundred one million, five hundred twenty thousand, seven hundred one".