1421204040 has 192 divisors, whose sum is σ = 4951065600. Its totient is φ = 352636416.

The previous prime is 1421204039. The next prime is 1421204053. The reversal of 1421204040 is 404021241.

1421204040 is a `hidden beast` number, since 1 + 421 + 204 + 0 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304041 + ... + 308679.

It is an arithmetic number, because the mean of its divisors is an integer number (25786800).

Almost surely, 2^1421204040 is an apocalyptic number.

1421204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421204040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2475532800).

1421204040 is an abundant number, since it is smaller than the sum of its proper divisors (3529861560).

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

1421204040 is a wasteful number, since it uses less digits than its factorization.

1421204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716 (or 4709 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1421204040 is about 37698.8599297114. The cubic root of 1421204040 is about 1124.3084579564.

Adding to 1421204040 its reverse (404021241), we get a palindrome (1825225281).

The spelling of 1421204040 in words is "one billion, four hundred twenty-one million, two hundred four thousand, forty".