1012172551 has 8 divisors (see below), whose sum is σ = 1106302064. Its totient is φ = 920367360.

The previous prime is 1012172543. The next prime is 1012172561. The reversal of 1012172551 is 1552712101.

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

It is a cyclic number.

It is not a de Polignac number, because 1012172551 - 2³ = 1012172543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012172561) 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, 580170 + ... + 581911.

It is an arithmetic number, because the mean of its divisors is an integer number (138287758).

Almost surely, 2^1012172551 is an apocalyptic number.

1012172551 is a deficient number, since it is larger than the sum of its proper divisors (94129513).

1012172551 is a wasteful number, since it uses less digits than its factorization.

1012172551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162161.

The product of its (nonzero) digits is 700, while the sum is 25.

The square root of 1012172551 is about 31814.6593726854. The cubic root of 1012172551 is about 1004.0411639948.

Adding to 1012172551 its reverse (1552712101), we get a palindrome (2564884652).

The spelling of 1012172551 in words is "one billion, twelve million, one hundred seventy-two thousand, five hundred fifty-one".