1552542121 has 16 divisors (see below), whose sum is σ = 1714840848. Its totient is φ = 1396454400.

The previous prime is 1552542083. The next prime is 1552542149. The reversal of 1552542121 is 1212452551.

It can be written as a sum of positive squares in 8 ways, for example, as 179024400 + 1373517721 = 13380^2 + 37061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1552542121 - 2⁷ = 1552541993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1552542121.

It is not an unprimeable number, because it can be changed into a prime (1552542151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 679501 + ... + 681781.

It is an arithmetic number, because the mean of its divisors is an integer number (107177553).

Almost surely, 2^1552542121 is an apocalyptic number.

It is an amenable number.

1552542121 is a deficient number, since it is larger than the sum of its proper divisors (162298727).

1552542121 is a wasteful number, since it uses less digits than its factorization.

1552542121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612.

The product of its digits is 4000, while the sum is 28.

The square root of 1552542121 is about 39402.3111124208. The cubic root of 1552542121 is about 1157.9268661499.

Adding to 1552542121 its reverse (1212452551), we get a palindrome (2764994672).

The spelling of 1552542121 in words is "one billion, five hundred fifty-two million, five hundred forty-two thousand, one hundred twenty-one".