1072156001 has 8 divisors (see below), whose sum is σ = 1227677184. Its totient is φ = 917223840.

The previous prime is 1072155991. The next prime is 1072156009. The reversal of 1072156001 is 1006512701.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1072156001 is a prime.

It is a super-2 number, since 2×1072156001² = 2299036980960624002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072156009) 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, 143345 + ... + 150638.

It is an arithmetic number, because the mean of its divisors is an integer number (153459648).

Almost surely, 2^1072156001 is an apocalyptic number.

It is an amenable number.

1072156001 is a deficient number, since it is larger than the sum of its proper divisors (155521183).

1072156001 is an equidigital number, since it uses as much as digits as its factorization.

1072156001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294511.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 1072156001 is about 32743.7933202615. The cubic root of 1072156001 is about 1023.4956320608.

Adding to 1072156001 its reverse (1006512701), we get a palindrome (2078668702).

The spelling of 1072156001 in words is "one billion, seventy-two million, one hundred fifty-six thousand, one".