1421555430 has 32 divisors (see below), whose sum is σ = 3412790784. Its totient is φ = 378963936.

The previous prime is 1421555393. The next prime is 1421555441. The reversal of 1421555430 is 345551241.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 138537 + ... + 148443.

It is an arithmetic number, because the mean of its divisors is an integer number (106649712).

Almost surely, 2^1421555430 is an apocalyptic number.

1421555430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421555430 is an abundant number, since it is smaller than the sum of its proper divisors (1991235354).

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

1421555430 is a wasteful number, since it uses less digits than its factorization.

1421555430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14700.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1421555430 is about 37703.5201274364. The cubic root of 1421555430 is about 1124.4011113644.

The spelling of 1421555430 in words is "one billion, four hundred twenty-one million, five hundred fifty-five thousand, four hundred thirty".