1225140 has 48 divisors (see below), whose sum is σ = 3921792. Its totient is φ = 279936.

The previous prime is 1225129. The next prime is 1225153. The reversal of 1225140 is 415221.

1225140 = T₁₅₁ + T₁₅₂ + ... + T₂₂₀.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 1039 + ... + 1878.

It is an arithmetic number, because the mean of its divisors is an integer number (81704).

2^1225140 is an apocalyptic number.

1225140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225140 is an abundant number, since it is smaller than the sum of its proper divisors (2696652).

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

1225140 is a wasteful number, since it uses less digits than its factorization.

1225140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936 (or 2934 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1225140 is about 1106.8604248052. The cubic root of 1225140 is about 107.0028240440.

It can be divided in two parts, 12 and 25140, that added together give a palindrome (25152).

The spelling of 1225140 in words is "one million, two hundred twenty-five thousand, one hundred forty".