1299740 has 24 divisors (see below), whose sum is σ = 2940000. Its totient is φ = 479808.

The previous prime is 1299721. The next prime is 1299743. The reversal of 1299740 is 479921.

It is a junction number, because it is equal to n+sod(n) for n = 1299697 and 1299706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240 + ... + 2759.

It is an arithmetic number, because the mean of its divisors is an integer number (122500).

2^1299740 is an apocalyptic number.

1299740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299740 is an abundant number, since it is smaller than the sum of its proper divisors (1640260).

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

1299740 is a wasteful number, since it uses less digits than its factorization.

1299740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021 (or 5019 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1299740 is about 1140.0614018552. The cubic root of 1299740 is about 109.1320118684.

The spelling of 1299740 in words is "one million, two hundred ninety-nine thousand, seven hundred forty".