1551120425 has 24 divisors (see below), whose sum is σ = 1959993600. Its totient is φ = 1217462400.

The previous prime is 1551120421. The next prime is 1551120427. The reversal of 1551120425 is 5240211551.

It is not a de Polignac number, because 1551120425 - 2² = 1551120421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1551120394 and 1551120403.

It is not an unprimeable number, because it can be changed into a prime (1551120421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361040 + ... + 365310.

It is an arithmetic number, because the mean of its divisors is an integer number (81666400).

Almost surely, 2^1551120425 is an apocalyptic number.

It is an amenable number.

1551120425 is a deficient number, since it is larger than the sum of its proper divisors (408873175).

1551120425 is a wasteful number, since it uses less digits than its factorization.

1551120425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553 (or 4548 counting only the distinct ones).

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

The square root of 1551120425 is about 39384.2662112677. The cubic root of 1551120425 is about 1157.5733120830.

Adding to 1551120425 its reverse (5240211551), we get a palindrome (6791331976).

The spelling of 1551120425 in words is "one billion, five hundred fifty-one million, one hundred twenty thousand, four hundred twenty-five".