1181420 has 24 divisors (see below), whose sum is σ = 2612400. Its totient is φ = 447552.

The previous prime is 1181413. The next prime is 1181437. The reversal of 1181420 is 241811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175 + ... + 1934.

It is an arithmetic number, because the mean of its divisors is an integer number (108850).

2^1181420 is an apocalyptic number.

1181420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181420 is an abundant number, since it is smaller than the sum of its proper divisors (1430980).

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

1181420 is a wasteful number, since it uses less digits than its factorization.

1181420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137 (or 3135 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1181420 is about 1086.9314605807. The cubic root of 1181420 is about 105.7145518098.

The spelling of 1181420 in words is "one million, one hundred eighty-one thousand, four hundred twenty".