1405125123 has 8 divisors (see below), whose sum is σ = 1983706128. Its totient is φ = 881647104.

The previous prime is 1405125091. The next prime is 1405125133. The reversal of 1405125123 is 3215215041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1405125123 - 2⁵ = 1405125091 is a prime.

It is a super-2 number, since 2×1405125123² = 3948753222571530258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1405125093 and 1405125102.

It is not an unprimeable number, because it can be changed into a prime (1405125133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13775686 + ... + 13775787.

It is an arithmetic number, because the mean of its divisors is an integer number (247963266).

Almost surely, 2^1405125123 is an apocalyptic number.

1405125123 is a deficient number, since it is larger than the sum of its proper divisors (578581005).

1405125123 is a wasteful number, since it uses less digits than its factorization.

1405125123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27551493.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1405125123 is about 37484.9986394558. The cubic root of 1405125123 is about 1120.0523792999.

The spelling of 1405125123 in words is "one billion, four hundred five million, one hundred twenty-five thousand, one hundred twenty-three".