1012155 has 8 divisors (see below), whose sum is σ = 1619472. Its totient is φ = 539808.

The previous prime is 1012147. The next prime is 1012159. The reversal of 1012155 is 5512101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1012155 - 2³ = 1012147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 67477 = 1012155 / (1 + 0 + 1 + 2 + 1 + 5 + 5).

It is not an unprimeable number, because it can be changed into a prime (1012159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33724 + ... + 33753.

It is an arithmetic number, because the mean of its divisors is an integer number (202434).

2^1012155 is an apocalyptic number.

1012155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1012155 is a deficient number, since it is larger than the sum of its proper divisors (607317).

1012155 is an equidigital number, since it uses as much as digits as its factorization.

1012155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67485.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1012155 is about 1006.0591433907. The cubic root of 1012155 is about 100.4035360627.

Adding to 1012155 its reverse (5512101), we get a palindrome (6524256).

It can be divided in two parts, 10121 and 55, that multiplied together give a palindrome (556655).

The spelling of 1012155 in words is "one million, twelve thousand, one hundred fifty-five".