1020156 has 24 divisors (see below), whose sum is σ = 2400384. Its totient is φ = 337200.

The previous prime is 1020143. The next prime is 1020157. The reversal of 1020156 is 6510201.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020157) 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, 1531 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (100016).

2^1020156 is an apocalyptic number.

It is an amenable number.

1020156 is an abundant number, since it is smaller than the sum of its proper divisors (1380228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020156 is a wasteful number, since it uses less digits than its factorization.

1020156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1020156 is about 1010.0277223918. The cubic root of 1020156 is about 100.6674024965.

Adding to 1020156 its reverse (6510201), we get a palindrome (7530357).

It can be divided in two parts, 1020 and 156, that added together give a triangular number (1176 = T₄₈).

The spelling of 1020156 in words is "one million, twenty thousand, one hundred fifty-six".