1228725 has 36 divisors (see below), whose sum is σ = 2269696. Its totient is φ = 635040.

The previous prime is 1228693. The next prime is 1228741. The reversal of 1228725 is 5278221.

1228725 = 36³ + 37³ + ... + 50³.

It is not a de Polignac number, because 1228725 - 2⁵ = 1228693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9612 + ... + 9738.

2^1228725 is an apocalyptic number.

1228725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1228725 is a deficient number, since it is larger than the sum of its proper divisors (1040971).

1228725 is a wasteful number, since it uses less digits than its factorization.

1228725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 178 counting only the distinct ones).

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

The square root of 1228725 is about 1108.4786872105. The cubic root of 1228725 is about 107.1070928251.

It can be divided in two parts, 1228 and 725, that added together give a triangular number (1953 = T₆₂).

The spelling of 1228725 in words is "one million, two hundred twenty-eight thousand, seven hundred twenty-five".