1023455542 has 4 divisors (see below), whose sum is σ = 1535183316. Its totient is φ = 511727770.

The previous prime is 1023455533. The next prime is 1023455551. The reversal of 1023455542 is 2455543201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1023455533) and next prime (1023455551).

It is a super-2 number, since 2×1023455542² = 2094922492901027528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255863884 + ... + 255863887.

It is an arithmetic number, because the mean of its divisors is an integer number (383795829).

Almost surely, 2^1023455542 is an apocalyptic number.

1023455542 is a deficient number, since it is larger than the sum of its proper divisors (511727774).

1023455542 is an equidigital number, since it uses as much as digits as its factorization.

1023455542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511727773.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 1023455542 is about 31991.4917126413. The cubic root of 1023455542 is about 1007.7581691587.

Adding to 1023455542 its reverse (2455543201), we get a palindrome (3478998743).

The spelling of 1023455542 in words is "one billion, twenty-three million, four hundred fifty-five thousand, five hundred forty-two".