1550421125 has 32 divisors (see below), whose sum is σ = 2117187072. Its totient is φ = 1124184000.

The previous prime is 1550421121. The next prime is 1550421127. The reversal of 1550421125 is 5211240551.

It is not a de Polignac number, because 1550421125 - 2² = 1550421121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1550421094 and 1550421103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550421121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 511364 + ... + 514386.

It is an arithmetic number, because the mean of its divisors is an integer number (66162096).

Almost surely, 2^1550421125 is an apocalyptic number.

It is an amenable number.

1550421125 is a deficient number, since it is larger than the sum of its proper divisors (566765947).

1550421125 is a wasteful number, since it uses less digits than its factorization.

1550421125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422 (or 3412 counting only the distinct ones).

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

The square root of 1550421125 is about 39375.3872996825. The cubic root of 1550421125 is about 1157.3993275912.

Adding to 1550421125 its reverse (5211240551), we get a palindrome (6761661676).

The spelling of 1550421125 in words is "one billion, five hundred fifty million, four hundred twenty-one thousand, one hundred twenty-five".