421237740 has 192 divisors, whose sum is σ = 1491840000. Its totient is φ = 86261760.

The previous prime is 421237723. The next prime is 421237753. The reversal of 421237740 is 47732124.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 421237698 and 421237707.

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, 336636 + ... + 337884.

It is an arithmetic number, because the mean of its divisors is an integer number (7770000).

Almost surely, 2^421237740 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 421237740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745920000).

421237740 is an abundant number, since it is smaller than the sum of its proper divisors (1070602260).

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

421237740 is a wasteful number, since it uses less digits than its factorization.

421237740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 421237740 is about 20524.0770803464. The cubic root of 421237740 is about 749.6221741399.

Adding to 421237740 its reverse (47732124), we get a palindrome (468969864).

The spelling of 421237740 in words is "four hundred twenty-one million, two hundred thirty-seven thousand, seven hundred forty".