1373436 has 48 divisors (see below), whose sum is σ = 3627680. Its totient is φ = 454896.

The previous prime is 1373431. The next prime is 1373441. The reversal of 1373436 is 6343731.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1373431) and next prime (1373441).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

Its product of digits (4536) is a multiple of the sum of its prime divisors (162).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8670 + ... + 8826.

2^1373436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1373436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813840).

1373436 is an abundant number, since it is smaller than the sum of its proper divisors (2254244).

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

1373436 is an equidigital number, since it uses as much as digits as its factorization.

1373436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 162 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 1373436 is about 1171.9368583674. The cubic root of 1373436 is about 111.1568272618.

Subtracting from 1373436 its product of digits (4536), we obtain a square (1368900 = 1170²).

The spelling of 1373436 in words is "one million, three hundred seventy-three thousand, four hundred thirty-six".