1265420 has 48 divisors (see below), whose sum is σ = 2972928. Its totient is φ = 449280.

The previous prime is 1265393. The next prime is 1265431. The reversal of 1265420 is 245621.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1265392 and 1265401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7982 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (61936).

2^1265420 is an apocalyptic number.

1265420 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 1265420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486464).

1265420 is an abundant number, since it is smaller than the sum of its proper divisors (1707508).

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

1265420 is a wasteful number, since it uses less digits than its factorization.

1265420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1265420 is about 1124.9088851992. The cubic root of 1265420 is about 108.1628772372.

The spelling of 1265420 in words is "one million, two hundred sixty-five thousand, four hundred twenty".