1401621573 has 16 divisors (see below), whose sum is σ = 2061633600. Its totient is φ = 839921280.

The previous prime is 1401621563. The next prime is 1401621629. The reversal of 1401621573 is 3751261041.

It is not a de Polignac number, because 1401621573 - 2⁶ = 1401621509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1401621573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401621553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235678 + ... + 241551.

It is an arithmetic number, because the mean of its divisors is an integer number (128852100).

Almost surely, 2^1401621573 is an apocalyptic number.

It is an amenable number.

1401621573 is a deficient number, since it is larger than the sum of its proper divisors (660012027).

1401621573 is a wasteful number, since it uses less digits than its factorization.

1401621573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477332.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1401621573 is about 37438.2367773911. The cubic root of 1401621573 is about 1119.1206887136.

The spelling of 1401621573 in words is "one billion, four hundred one million, six hundred twenty-one thousand, five hundred seventy-three".