1261388 has 12 divisors (see below), whose sum is σ = 2230872. Its totient is φ = 624000.

The previous prime is 1261387. The next prime is 1261411. The reversal of 1261388 is 8831621.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1261388.

It is not an unprimeable number, because it can be changed into a prime (1261387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238 + ... + 2013.

It is an arithmetic number, because the mean of its divisors is an integer number (185906).

2^1261388 is an apocalyptic number.

It is an amenable number.

1261388 is a deficient number, since it is larger than the sum of its proper divisors (969484).

1261388 is a wasteful number, since it uses less digits than its factorization.

1261388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352 (or 3350 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 1261388 is about 1123.1153101975. The cubic root of 1261388 is about 108.0478754362.

The spelling of 1261388 in words is "one million, two hundred sixty-one thousand, three hundred eighty-eight".