1405555420 has 12 divisors (see below), whose sum is σ = 2951666424. Its totient is φ = 562222160.

The previous prime is 1405555409. The next prime is 1405555423. The reversal of 1405555420 is 245555041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405555423) 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, 35138866 + ... + 35138905.

It is an arithmetic number, because the mean of its divisors is an integer number (245972202).

Almost surely, 2^1405555420 is an apocalyptic number.

1405555420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405555420 is an abundant number, since it is smaller than the sum of its proper divisors (1546111004).

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

1405555420 is a wasteful number, since it uses less digits than its factorization.

1405555420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70277780 (or 70277778 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 1405555420 is about 37490.7377894861. The cubic root of 1405555420 is about 1120.1667003147.

The spelling of 1405555420 in words is "one billion, four hundred five million, five hundred fifty-five thousand, four hundred twenty".