1125213501 has 8 divisors (see below), whose sum is σ = 1501310464. Its totient is φ = 749629440.

The previous prime is 1125213499. The next prime is 1125213517. The reversal of 1125213501 is 1053125211.

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

It is not a de Polignac number, because 1125213501 - 2¹ = 1125213499 is a prime.

It is a super-2 number, since 2×1125213501² = 2532210845665354002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125213701) 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, 123076 + ... + 131901.

It is an arithmetic number, because the mean of its divisors is an integer number (187663808).

Almost surely, 2^1125213501 is an apocalyptic number.

It is an amenable number.

1125213501 is a deficient number, since it is larger than the sum of its proper divisors (376096963).

1125213501 is a wasteful number, since it uses less digits than its factorization.

1125213501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256451.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1125213501 is about 33544.2021965048. The cubic root of 1125213501 is about 1040.1076999535.

Adding to 1125213501 its reverse (1053125211), we get a palindrome (2178338712).

It can be divided in two parts, 11252 and 13501, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 1125213501 in words is "one billion, one hundred twenty-five million, two hundred thirteen thousand, five hundred one".