1401442641 has 20 divisors (see below), whose sum is σ = 2203700400. Its totient is φ = 885120696.

The previous prime is 1401442639. The next prime is 1401442643. The reversal of 1401442641 is 1462441041.

1401442641 is a `hidden beast` number, since 1 + 4 + 0 + 14 + 4 + 2 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (1401442639) and next prime (1401442643).

It is not a de Polignac number, because 1401442641 - 2¹ = 1401442639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1401442643) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 453771 + ... + 456848.

It is an arithmetic number, because the mean of its divisors is an integer number (110185020).

Almost surely, 2^1401442641 is an apocalyptic number.

It is an amenable number.

1401442641 is a deficient number, since it is larger than the sum of its proper divisors (802257759).

1401442641 is an equidigital number, since it uses as much as digits as its factorization.

1401442641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910650 (or 910641 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1401442641 is about 37435.8470052435. The cubic root of 1401442641 is about 1119.0730641078.

Adding to 1401442641 its reverse (1462441041), we get a palindrome (2863883682).

The spelling of 1401442641 in words is "one billion, four hundred one million, four hundred forty-two thousand, six hundred forty-one".