1553157 has 6 divisors (see below), whose sum is σ = 2243462. Its totient is φ = 1035432.

The previous prime is 1553147. The next prime is 1553159. The reversal of 1553157 is 7513551.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 367236 = 1089^2 + 606^2 .

It is not a de Polignac number, because 1553157 - 2⁶ = 1553093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86278 + ... + 86295.

2^1553157 is an apocalyptic number.

It is an amenable number.

1553157 is a deficient number, since it is larger than the sum of its proper divisors (690305).

1553157 is a wasteful number, since it uses less digits than its factorization.

1553157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172579 (or 172576 counting only the distinct ones).

The product of its digits is 2625, while the sum is 27.

The square root of 1553157 is about 1246.2571965690. The cubic root of 1553157 is about 115.8079710300.

The spelling of 1553157 in words is "one million, five hundred fifty-three thousand, one hundred fifty-seven".