1261420 has 24 divisors (see below), whose sum is σ = 2696400. Its totient is φ = 495552.

The previous prime is 1261411. The next prime is 1261427. The reversal of 1261420 is 241621.

It is a junction number, because it is equal to n+sod(n) for n = 1261394 and 1261403.

It is not an unprimeable number, because it can be changed into a prime (1261427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (112350).

2^1261420 is an apocalyptic number.

1261420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261420 is an abundant number, since it is smaller than the sum of its proper divisors (1434980).

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

1261420 is a wasteful number, since it uses less digits than its factorization.

1261420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1261420 is about 1123.1295561955. The cubic root of 1261420 is about 108.0487891130.

It can be divided in two parts, 1261 and 420, that added together give a square (1681 = 41²).

The spelling of 1261420 in words is "one million, two hundred sixty-one thousand, four hundred twenty".