1231245654 has 16 divisors (see below), whose sum is σ = 2468345520. Its totient is φ = 409439520.

The previous prime is 1231245629. The next prime is 1231245661. The reversal of 1231245654 is 4565421321.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241189 + ... + 246240.

It is an arithmetic number, because the mean of its divisors is an integer number (154271595).

Almost surely, 2^1231245654 is an apocalyptic number.

1231245654 is an abundant number, since it is smaller than the sum of its proper divisors (1237099866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231245654 is a wasteful number, since it uses less digits than its factorization.

1231245654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487855.

The product of its digits is 28800, while the sum is 33.

The square root of 1231245654 is about 35089.1101910550. The cubic root of 1231245654 is about 1071.8028401008.

Adding to 1231245654 its reverse (4565421321), we get a palindrome (5796666975).

It can be divided in two parts, 123124 and 5654, that added together give a triangular number (128778 = T₅₀₇).

The spelling of 1231245654 in words is "one billion, two hundred thirty-one million, two hundred forty-five thousand, six hundred fifty-four".