1372645 has 4 divisors (see below), whose sum is σ = 1647180. Its totient is φ = 1098112.

The previous prime is 1372633. The next prime is 1372661. The reversal of 1372645 is 5462731.

1372645 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5462731 = 89 ⋅61379.

It can be written as a sum of positive squares in 2 ways, for example, as 408321 + 964324 = 639^2 + 982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372645 - 2¹¹ = 1370597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137260 + ... + 137269.

It is an arithmetic number, because the mean of its divisors is an integer number (411795).

2^1372645 is an apocalyptic number.

It is an amenable number.

1372645 is a deficient number, since it is larger than the sum of its proper divisors (274535).

1372645 is an equidigital number, since it uses as much as digits as its factorization.

1372645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274534.

The product of its digits is 5040, while the sum is 28.

The square root of 1372645 is about 1171.5993342436. The cubic root of 1372645 is about 111.1354837275.

The spelling of 1372645 in words is "one million, three hundred seventy-two thousand, six hundred forty-five".