1245555431 has 16 divisors (see below), whose sum is σ = 1339200000. Its totient is φ = 1154897856.

The previous prime is 1245555427. The next prime is 1245555433. The reversal of 1245555431 is 1345555421.

It is a cyclic number.

It is not a de Polignac number, because 1245555431 - 2² = 1245555427 is a prime.

It is a super-2 number, since 2×1245555431² = 3102816663387191522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245555391 and 1245555400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245555433) 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, 265595 + ... + 270243.

It is an arithmetic number, because the mean of its divisors is an integer number (83700000).

Almost surely, 2^1245555431 is an apocalyptic number.

1245555431 is a deficient number, since it is larger than the sum of its proper divisors (93644569).

1245555431 is a wasteful number, since it uses less digits than its factorization.

1245555431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966.

The product of its digits is 60000, while the sum is 35.

The square root of 1245555431 is about 35292.4273888890. The cubic root of 1245555431 is about 1075.9390909884.

It can be divided in two parts, 124 and 5555431, that added together give a palindrome (5555555).

The spelling of 1245555431 in words is "one billion, two hundred forty-five million, five hundred fifty-five thousand, four hundred thirty-one".