1272990 has 16 divisors (see below), whose sum is σ = 3055248. Its totient is φ = 339456.

The previous prime is 1272989. The next prime is 1272991. The reversal of 1272990 is 992721.

It is an interprime number because it is at equal distance from previous prime (1272989) and next prime (1272991).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 42433 = 1272990 / (1 + 2 + 7 + 2 + 9 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21187 + ... + 21246.

It is an arithmetic number, because the mean of its divisors is an integer number (190953).

2^1272990 is an apocalyptic number.

1272990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272990 is an abundant number, since it is smaller than the sum of its proper divisors (1782258).

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

1272990 is a wasteful number, since it uses less digits than its factorization.

1272990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42443.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1272990 is about 1128.2685850452. The cubic root of 1272990 is about 108.3781326878.

The spelling of 1272990 in words is "one million, two hundred seventy-two thousand, nine hundred ninety".