1421235901428 has 192 divisors, whose sum is σ = 4003088947200. Its totient is φ = 383874624000.

The previous prime is 1421235901381. The next prime is 1421235901541. The reversal of 1421235901428 is 8241095321241.

It is a happy number.

It is a super-2 number, since 2×1421235901428² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1421235901428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36055026 + ... + 36094422.

It is an arithmetic number, because the mean of its divisors is an integer number (20849421600).

Almost surely, 2^{1421235901428} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421235901428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2001544473600).

1421235901428 is an abundant number, since it is smaller than the sum of its proper divisors (2581853045772).

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

1421235901428 is a wasteful number, since it uses less digits than its factorization.

1421235901428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39750 (or 39748 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 1421235901428 in words is "one trillion, four hundred twenty-one billion, two hundred thirty-five million, nine hundred one thousand, four hundred twenty-eight".