1421332040 has 32 divisors (see below), whose sum is σ = 3199194360. Its totient is φ = 568320000.

The previous prime is 1421332013. The next prime is 1421332043. The reversal of 1421332040 is 402331241.

It can be written as a sum of positive squares in 4 ways, for example, as 1238054596 + 183277444 = 35186^2 + 13538^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1421332043) 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, 143240 + ... + 152840.

Almost surely, 2^1421332040 is an apocalyptic number.

1421332040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421332040 is an abundant number, since it is smaller than the sum of its proper divisors (1777862320).

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

1421332040 is a wasteful number, since it uses less digits than its factorization.

1421332040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13313 (or 13309 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1421332040 is about 37700.5575555588. The cubic root of 1421332040 is about 1124.3422103612.

Adding to 1421332040 its reverse (402331241), we get a palindrome (1823663281).

The spelling of 1421332040 in words is "one billion, four hundred twenty-one million, three hundred thirty-two thousand, forty".