1240785 has 64 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 518400.

The previous prime is 1240777. The next prime is 1240793. The reversal of 1240785 is 5870421.

It is an interprime number because it is at equal distance from previous prime (1240777) and next prime (1240793).

It is not a de Polignac number, because 1240785 - 2³ = 1240777 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 12235 + ... + 12335.

It is an arithmetic number, because the mean of its divisors is an integer number (42840).

2^1240785 is an apocalyptic number.

1240785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240785 is an abundant number, since it is smaller than the sum of its proper divisors (1500975).

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

1240785 is a wasteful number, since it uses less digits than its factorization.

1240785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1240785 is about 1113.9052922040. The cubic root of 1240785 is about 107.4563731391.

It can be divided in two parts, 1240 and 785, that added together give a square (2025 = 45²).

The spelling of 1240785 in words is "one million, two hundred forty thousand, seven hundred eighty-five".