1421136280 has 32 divisors (see below), whose sum is σ = 3209738400. Its totient is φ = 566288896.

The previous prime is 1421136257. The next prime is 1421136281. The reversal of 1421136280 is 826311241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421136281) 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, 57025 + ... + 78064.

It is an arithmetic number, because the mean of its divisors is an integer number (100304325).

Almost surely, 2^1421136280 is an apocalyptic number.

1421136280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421136280 is an abundant number, since it is smaller than the sum of its proper divisors (1788602120).

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

1421136280 is a wasteful number, since it uses less digits than its factorization.

1421136280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135363 (or 135359 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1421136280 is about 37697.9612180818. The cubic root of 1421136280 is about 1124.2905894567.

The spelling of 1421136280 in words is "one billion, four hundred twenty-one million, one hundred thirty-six thousand, two hundred eighty".