1872553 has 2 divisors, whose sum is σ = 1872554. Its totient is φ = 1872552.

The previous prime is 1872547. The next prime is 1872557. The reversal of 1872553 is 3552781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1671849 + 200704 = 1293^2 + 448^2 .

It is an emirp because it is prime and its reverse (3552781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1872553 - 2¹³ = 1864361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1872557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936276 + 936277.

It is an arithmetic number, because the mean of its divisors is an integer number (936277).

2^1872553 is an apocalyptic number.

It is an amenable number.

1872553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872553 is an equidigital number, since it uses as much as digits as its factorization.

1872553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 31.

The square root of 1872553 is about 1368.4125839819. The cubic root of 1872553 is about 123.2569375109.

The spelling of 1872553 in words is "one million, eight hundred seventy-two thousand, five hundred fifty-three".