1242462640 has 160 divisors (see below), whose sum is σ = 3117514752. Its totient is φ = 459648000.

The previous prime is 1242462619. The next prime is 1242462653. The reversal of 1242462640 is 462642421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6504945 + ... + 6505135.

Almost surely, 2^1242462640 is an apocalyptic number.

1242462640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242462640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558757376).

1242462640 is an abundant number, since it is smaller than the sum of its proper divisors (1875052112).

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

1242462640 is a wasteful number, since it uses less digits than its factorization.

1242462640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 1242462640 is about 35248.5835176394. The cubic root of 1242462640 is about 1075.0478118270.

The spelling of 1242462640 in words is "one billion, two hundred forty-two million, four hundred sixty-two thousand, six hundred forty".