1405121442 has 32 divisors (see below), whose sum is σ = 2852515008. Its totient is φ = 461362176.

The previous prime is 1405121437. The next prime is 1405121479. The reversal of 1405121442 is 2441215041.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171798 + ... + 179790.

It is an arithmetic number, because the mean of its divisors is an integer number (89141094).

Almost surely, 2^1405121442 is an apocalyptic number.

1405121442 is an abundant number, since it is smaller than the sum of its proper divisors (1447393566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1405121442 is a wasteful number, since it uses less digits than its factorization.

1405121442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8434.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1405121442 is about 37484.9495397820. The cubic root of 1405121442 is about 1120.0514012336.

Adding to 1405121442 its reverse (2441215041), we get a palindrome (3846336483).

The spelling of 1405121442 in words is "one billion, four hundred five million, one hundred twenty-one thousand, four hundred forty-two".