401143745 has 16 divisors (see below), whose sum is σ = 485374032. Its totient is φ = 318259200.

The previous prime is 401143733. The next prime is 401143763. The reversal of 401143745 is 547341104.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1183744 + 399960001 = 1088^2 + 19999^2 .

It is not a de Polignac number, because 401143745 - 2¹² = 401139649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571895 + ... + 572595.

It is an arithmetic number, because the mean of its divisors is an integer number (30335877).

Almost surely, 2^401143745 is an apocalyptic number.

It is an amenable number.

401143745 is a deficient number, since it is larger than the sum of its proper divisors (84230287).

401143745 is a wasteful number, since it uses less digits than its factorization.

401143745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 401143745 is about 20028.5732142856. The cubic root of 401143745 is about 737.5078968799.

Adding to 401143745 its reverse (547341104), we get a palindrome (948484849).

The spelling of 401143745 in words is "four hundred one million, one hundred forty-three thousand, seven hundred forty-five".