1551355 has 16 divisors (see below), whose sum is σ = 2076480. Its totient is φ = 1104768.

The previous prime is 1551343. The next prime is 1551371. The reversal of 1551355 is 5531551.

It is a cyclic number.

It is not a de Polignac number, because 1551355 - 2¹⁷ = 1420283 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474 + ... + 2296.

It is an arithmetic number, because the mean of its divisors is an integer number (129780).

2^1551355 is an apocalyptic number.

1551355 is a deficient number, since it is larger than the sum of its proper divisors (525125).

1551355 is a wasteful number, since it uses less digits than its factorization.

1551355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 1875, while the sum is 25.

The square root of 1551355 is about 1245.5340220163. The cubic root of 1551355 is about 115.7631662178.

The spelling of 1551355 in words is "one million, five hundred fifty-one thousand, three hundred fifty-five".