1242153501 has 12 divisors (see below), whose sum is σ = 1759360512. Its totient is φ = 779389888.

The previous prime is 1242153487. The next prime is 1242153503. The reversal of 1242153501 is 1053512421.

It is a happy number.

It is not a de Polignac number, because 1242153501 - 2⁵ = 1242153469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242153503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 715485 + ... + 717218.

It is an arithmetic number, because the mean of its divisors is an integer number (146613376).

Almost surely, 2^1242153501 is an apocalyptic number.

It is an amenable number.

1242153501 is a deficient number, since it is larger than the sum of its proper divisors (517207011).

1242153501 is a wasteful number, since it uses less digits than its factorization.

1242153501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432740 (or 1432723 counting only the distinct ones).

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

The square root of 1242153501 is about 35244.1981182719. The cubic root of 1242153501 is about 1074.9586430096.

Adding to 1242153501 its reverse (1053512421), we get a palindrome (2295665922).

The spelling of 1242153501 in words is "one billion, two hundred forty-two million, one hundred fifty-three thousand, five hundred one".