1264890 has 32 divisors (see below), whose sum is σ = 3312576. Its totient is φ = 306560.

The previous prime is 1264889. The next prime is 1264897. The reversal of 1264890 is 984621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1264897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1587 + ... + 2246.

It is an arithmetic number, because the mean of its divisors is an integer number (103518).

2^1264890 is an apocalyptic number.

1264890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264890 is an abundant number, since it is smaller than the sum of its proper divisors (2047686).

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

1264890 is a wasteful number, since it uses less digits than its factorization.

1264890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1264890 is about 1124.6732858924. The cubic root of 1264890 is about 108.1477743912.

The spelling of 1264890 in words is "one million, two hundred sixty-four thousand, eight hundred ninety".