1401657841 has 4 divisors (see below), whose sum is σ = 1449990900. Its totient is φ = 1353324784.

The previous prime is 1401657833. The next prime is 1401657853. The reversal of 1401657841 is 1487561041.

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 360240400 + 1041417441 = 18980^2 + 32271^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401657841 - 2³ = 1401657833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401657841.

It is not an unprimeable number, because it can be changed into a prime (1401657821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24166486 + ... + 24166543.

It is an arithmetic number, because the mean of its divisors is an integer number (362497725).

Almost surely, 2^1401657841 is an apocalyptic number.

It is an amenable number.

1401657841 is a deficient number, since it is larger than the sum of its proper divisors (48333059).

1401657841 is an equidigital number, since it uses as much as digits as its factorization.

1401657841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48333058.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1401657841 is about 37438.7211453597. The cubic root of 1401657841 is about 1119.1303413236.

The spelling of 1401657841 in words is "one billion, four hundred one million, six hundred fifty-seven thousand, eight hundred forty-one".