1249420 has 24 divisors (see below), whose sum is σ = 2646000. Its totient is φ = 495552.

The previous prime is 1249411. The next prime is 1249427. The reversal of 1249420 is 249421.

It is a super-2 number, since 2×1249420² = 3122100672800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1249391 and 1249400.

It is not an unprimeable number, because it can be changed into a prime (1249427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406 + ... + 3754.

It is an arithmetic number, because the mean of its divisors is an integer number (110250).

2^1249420 is an apocalyptic number.

1249420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1249420 is an abundant number, since it is smaller than the sum of its proper divisors (1396580).

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

1249420 is a wasteful number, since it uses less digits than its factorization.

1249420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1249420 is about 1117.7745747690. The cubic root of 1249420 is about 107.7050709624.

Subtracting from 1249420 its reverse (249421), we obtain a palindrome (999999).

The spelling of 1249420 in words is "one million, two hundred forty-nine thousand, four hundred twenty".