210742956 has 18 divisors (see below), whose sum is σ = 532711452. Its totient is φ = 70247640.

The previous prime is 210742949. The next prime is 210742963. The reversal of 210742956 is 659247012.

It is an interprime number because it is at equal distance from previous prime (210742949) and next prime (210742963).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5853971 = 210742956 / (2 + 1 + 0 + 7 + 4 + 2 + 9 + 5 + 6).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 210742956.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2926950 + ... + 2927021.

Almost surely, 2^210742956 is an apocalyptic number.

It is an amenable number.

210742956 is an abundant number, since it is smaller than the sum of its proper divisors (321968496).

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

210742956 is a wasteful number, since it uses less digits than its factorization.

210742956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853981 (or 5853976 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 210742956 is about 14516.9885306836. The cubic root of 210742956 is about 595.0923341393.

Adding to 210742956 its reverse (659247012), we get a palindrome (869989968).

The spelling of 210742956 in words is "two hundred ten million, seven hundred forty-two thousand, nine hundred fifty-six".