1405121252 has 24 divisors (see below), whose sum is σ = 2540251392. Its totient is φ = 679370400.

The previous prime is 1405121251. The next prime is 1405121273. The reversal of 1405121252 is 2521215041.

It is not an unprimeable number, because it can be changed into a prime (1405121251) 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, 191198 + ... + 198410.

It is an arithmetic number, because the mean of its divisors is an integer number (105843808).

Almost surely, 2^1405121252 is an apocalyptic number.

It is an amenable number.

1405121252 is a deficient number, since it is larger than the sum of its proper divisors (1135130140).

1405121252 is a wasteful number, since it uses less digits than its factorization.

1405121252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819 (or 8817 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1405121252 is about 37484.9470054314. The cubic root of 1405121252 is about 1120.0513507493.

Adding to 1405121252 its reverse (2521215041), we get a palindrome (3926336293).

The spelling of 1405121252 in words is "one billion, four hundred five million, one hundred twenty-one thousand, two hundred fifty-two".