149398742 has 4 divisors (see below), whose sum is σ = 224098116. Its totient is φ = 74699370.

The previous prime is 149398741. The next prime is 149398747. The reversal of 149398742 is 247893941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247893941 = 617 ⋅401773.

It is a super-2 number, since 2×149398742² = 44639968222365128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149398741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37349684 + ... + 37349687.

It is an arithmetic number, because the mean of its divisors is an integer number (56024529).

Almost surely, 2^149398742 is an apocalyptic number.

149398742 is a deficient number, since it is larger than the sum of its proper divisors (74699374).

149398742 is an equidigital number, since it uses as much as digits as its factorization.

149398742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74699373.

The product of its digits is 435456, while the sum is 47.

The square root of 149398742 is about 12222.8778117103. The cubic root of 149398742 is about 530.6184095162.

The spelling of 149398742 in words is "one hundred forty-nine million, three hundred ninety-eight thousand, seven hundred forty-two".