1421473240 has 128 divisors (see below), whose sum is σ = 3577271040. Its totient is φ = 504000000.

The previous prime is 1421473223. The next prime is 1421473259. The reversal of 1421473240 is 423741241.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1421473199 and 1421473208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5663115 + ... + 5663365.

It is an arithmetic number, because the mean of its divisors is an integer number (27947430).

Almost surely, 2^1421473240 is an apocalyptic number.

1421473240 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 1421473240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1788635520).

1421473240 is an abundant number, since it is smaller than the sum of its proper divisors (2155797800).

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

1421473240 is a wasteful number, since it uses less digits than its factorization.

1421473240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1421473240 is about 37702.4301604021. The cubic root of 1421473240 is about 1124.3794411323.

The spelling of 1421473240 in words is "one billion, four hundred twenty-one million, four hundred seventy-three thousand, two hundred forty".