1545420123 has 12 divisors (see below), whose sum is σ = 2403987040. Its totient is φ = 951027696.

The previous prime is 1545420101. The next prime is 1545420131. The reversal of 1545420123 is 3210245451.

1545420123 is a `hidden beast` number, since 1 + 5 + 454 + 201 + 2 + 3 = 666.

It is not a de Polignac number, because 1545420123 - 2¹² = 1545416027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1545420323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6604243 + ... + 6604476.

Almost surely, 2^1545420123 is an apocalyptic number.

1545420123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1545420123 is a deficient number, since it is larger than the sum of its proper divisors (858566917).

1545420123 is a wasteful number, since it uses less digits than its factorization.

1545420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208738 (or 13208735 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1545420123 is about 39311.8318448785. The cubic root of 1545420123 is about 1156.1535604863.

Adding to 1545420123 its reverse (3210245451), we get a palindrome (4755665574).

The spelling of 1545420123 in words is "one billion, five hundred forty-five million, four hundred twenty thousand, one hundred twenty-three".