1405420253 has 8 divisors (see below), whose sum is σ = 1479885600. Its totient is φ = 1331004528.

The previous prime is 1405420201. The next prime is 1405420279. The reversal of 1405420253 is 3520245041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1405420253 - 2⁸ = 1405419997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405420553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55250 + ... + 76572.

It is an arithmetic number, because the mean of its divisors is an integer number (184985700).

Almost surely, 2^1405420253 is an apocalyptic number.

It is an amenable number.

1405420253 is a deficient number, since it is larger than the sum of its proper divisors (74465347).

1405420253 is a wasteful number, since it uses less digits than its factorization.

1405420253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24811.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1405420253 is about 37488.9350742322. The cubic root of 1405420253 is about 1120.1307917517.

Adding to 1405420253 its reverse (3520245041), we get a palindrome (4925665294).

The spelling of 1405420253 in words is "one billion, four hundred five million, four hundred twenty thousand, two hundred fifty-three".