1401553 has 4 divisors (see below), whose sum is σ = 1416100. Its totient is φ = 1387008.

The previous prime is 1401529. The next prime is 1401559. The reversal of 1401553 is 3551041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3551041 = 13 ⋅273157.

It can be written as a sum of positive squares in 2 ways, for example, as 1106704 + 294849 = 1052^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401553 - 2¹³ = 1393361 is a prime.

It is an Ulam number.

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 1401553.

It is not an unprimeable number, because it can be changed into a prime (1401559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7128 + ... + 7321.

It is an arithmetic number, because the mean of its divisors is an integer number (354025).

2^1401553 is an apocalyptic number.

It is an amenable number.

1401553 is a deficient number, since it is larger than the sum of its proper divisors (14547).

1401553 is an equidigital number, since it uses as much as digits as its factorization.

1401553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14546.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1401553 is about 1183.8720370040. The cubic root of 1401553 is about 111.9102437778.

Adding to 1401553 its reverse (3551041), we get a palindrome (4952594).

The spelling of 1401553 in words is "one million, four hundred one thousand, five hundred fifty-three".