1215054125 has 8 divisors (see below), whose sum is σ = 1516387704. Its totient is φ = 972043200.

The previous prime is 1215054119. The next prime is 1215054149. The reversal of 1215054125 is 5214505121.

It can be written as a sum of positive squares in 4 ways, for example, as 267584164 + 947469961 = 16358^2 + 30781^2 .

It is not a de Polignac number, because 1215054125 - 2¹⁴ = 1215037741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215054094 and 1215054103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4860092 + ... + 4860341.

It is an arithmetic number, because the mean of its divisors is an integer number (189548463).

Almost surely, 2^1215054125 is an apocalyptic number.

It is an amenable number.

1215054125 is a deficient number, since it is larger than the sum of its proper divisors (301333579).

1215054125 is an frugal number, since it uses more digits than its factorization.

1215054125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720448 (or 9720438 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1215054125 is about 34857.6264969375. The cubic root of 1215054125 is about 1067.0838361200.

Adding to 1215054125 its reverse (5214505121), we get a palindrome (6429559246).

The spelling of 1215054125 in words is "one billion, two hundred fifteen million, fifty-four thousand, one hundred twenty-five".