1272390 has 64 divisors (see below), whose sum is σ = 3580416. Its totient is φ = 283392.

The previous prime is 1272379. The next prime is 1272409. The reversal of 1272390 is 932721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15289 + ... + 15371.

It is an arithmetic number, because the mean of its divisors is an integer number (55944).

2^1272390 is an apocalyptic number.

1272390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1790208).

1272390 is an abundant number, since it is smaller than the sum of its proper divisors (2308026).

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

1272390 is a wasteful number, since it uses less digits than its factorization.

1272390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1272390 is about 1128.0026595713. The cubic root of 1272390 is about 108.3611026774.

The spelling of 1272390 in words is "one million, two hundred seventy-two thousand, three hundred ninety".