1274640 has 80 divisors (see below), whose sum is σ = 4071168. Its totient is φ = 329728.

The previous prime is 1274633. The next prime is 1274671. The reversal of 1274640 is 464721.

1274640 = T₂₀₉ + T₂₁₀ + ... + T₂₅₅.

It is a Cunningham number, because it is equal to 1129²-1.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1274640.

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, 11224 + ... + 11336.

2^1274640 is an apocalyptic number.

1274640 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 1274640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2035584).

1274640 is an abundant number, since it is smaller than the sum of its proper divisors (2796528).

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

1274640 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 8 representation: 1274640 = (4671420)₈.

1274640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1274640 is about 1128.9995571301. Note that the first 3 decimals coincide. The cubic root of 1274640 is about 108.4249376412.

The spelling of 1274640 in words is "one million, two hundred seventy-four thousand, six hundred forty".